diff --git a/dev-packages/e2e-tests/test-applications/hydrogen-react-router-7/app/entry.client.tsx b/dev-packages/e2e-tests/test-applications/hydrogen-react-router-7/app/entry.client.tsx
index 9c48e56befe8..bd606bbe7c08 100644
--- a/dev-packages/e2e-tests/test-applications/hydrogen-react-router-7/app/entry.client.tsx
+++ b/dev-packages/e2e-tests/test-applications/hydrogen-react-router-7/app/entry.client.tsx
@@ -16,7 +16,7 @@ startTransition(() => {
   hydrateRoot(
     document,
     <StrictMode>
-      <HydratedRouter />
+      <HydratedRouter onError={Sentry.sentryOnError} />
     </StrictMode>,
   );
 });
diff --git a/dev-packages/e2e-tests/test-applications/hydrogen-react-router-7/app/root.tsx b/dev-packages/e2e-tests/test-applications/hydrogen-react-router-7/app/root.tsx
index afa85270e045..e45feb5dd576 100644
--- a/dev-packages/e2e-tests/test-applications/hydrogen-react-router-7/app/root.tsx
+++ b/dev-packages/e2e-tests/test-applications/hydrogen-react-router-7/app/root.tsx
@@ -1,4 +1,3 @@
-import * as Sentry from '@sentry/react-router/cloudflare';
 import { type LoaderFunctionArgs } from '@shopify/remix-oxygen';
 import {
   Outlet,
@@ -160,8 +159,6 @@ export function ErrorBoundary({ error }: { error: unknown }) {
   let errorMessage = 'Unknown error';
   let errorStatus = 500;
 
-  const eventId = Sentry.captureException(error);
-
   if (isRouteErrorResponse(error)) {
     errorMessage = error?.data?.message ?? error.data;
     errorStatus = error.status;
@@ -178,11 +175,6 @@ export function ErrorBoundary({ error }: { error: unknown }) {
           <pre>{errorMessage}</pre>
         </fieldset>
       )}
-      {eventId && (
-        <h2>
-          Sentry Event ID: <code>{eventId}</code>
-        </h2>
-      )}
     </div>
   );
 }
diff --git a/dev-packages/e2e-tests/test-applications/react-router-7-framework-custom/app/entry.client.tsx b/dev-packages/e2e-tests/test-applications/react-router-7-framework-custom/app/entry.client.tsx
index 925c1e6ab143..005268b40ad0 100644
--- a/dev-packages/e2e-tests/test-applications/react-router-7-framework-custom/app/entry.client.tsx
+++ b/dev-packages/e2e-tests/test-applications/react-router-7-framework-custom/app/entry.client.tsx
@@ -17,7 +17,7 @@ startTransition(() => {
   hydrateRoot(
     document,
     <StrictMode>
-      <HydratedRouter />
+      <HydratedRouter onError={Sentry.sentryOnError} />
     </StrictMode>,
   );
 });
diff --git a/dev-packages/e2e-tests/test-applications/react-router-7-framework-custom/app/root.tsx b/dev-packages/e2e-tests/test-applications/react-router-7-framework-custom/app/root.tsx
index 227c08f7730c..bc1b8f1236c0 100644
--- a/dev-packages/e2e-tests/test-applications/react-router-7-framework-custom/app/root.tsx
+++ b/dev-packages/e2e-tests/test-applications/react-router-7-framework-custom/app/root.tsx
@@ -1,4 +1,3 @@
-import * as Sentry from '@sentry/react-router';
 import { Links, Meta, Outlet, Scripts, ScrollRestoration, isRouteErrorResponse } from 'react-router';
 import type { Route } from './+types/root';
 import stylesheet from './app.css?url';
@@ -48,7 +47,6 @@ export function ErrorBoundary({ error }: Route.ErrorBoundaryProps) {
     message = error.status === 404 ? '404' : 'Error';
     details = error.status === 404 ? 'The requested page could not be found.' : error.statusText || details;
   } else if (error && error instanceof Error) {
-    Sentry.captureException(error);
     if (import.meta.env.DEV) {
       details = error.message;
       stack = error.stack;
diff --git a/dev-packages/e2e-tests/test-applications/react-router-7-framework-custom/tests/errors/errors.client.test.ts b/dev-packages/e2e-tests/test-applications/react-router-7-framework-custom/tests/errors/errors.client.test.ts
index d6c80924c121..c1a7de46f1b6 100644
--- a/dev-packages/e2e-tests/test-applications/react-router-7-framework-custom/tests/errors/errors.client.test.ts
+++ b/dev-packages/e2e-tests/test-applications/react-router-7-framework-custom/tests/errors/errors.client.test.ts
@@ -100,7 +100,8 @@ test.describe('client-side errors', () => {
             type: 'Error',
             value: errorMessage,
             mechanism: {
-              handled: true,
+              handled: false,
+              type: 'auto.function.react_router.on_error',
             },
           },
         ],
@@ -127,7 +128,8 @@ test.describe('client-side errors', () => {
             type: 'Error',
             value: errorMessage,
             mechanism: {
-              handled: true,
+              handled: false,
+              type: 'auto.function.react_router.on_error',
             },
           },
         ],
diff --git a/dev-packages/e2e-tests/test-applications/react-router-7-framework-instrumentation/app/entry.client.tsx b/dev-packages/e2e-tests/test-applications/react-router-7-framework-instrumentation/app/entry.client.tsx
index c8bd9df2ba99..9c9ccd812edd 100644
--- a/dev-packages/e2e-tests/test-applications/react-router-7-framework-instrumentation/app/entry.client.tsx
+++ b/dev-packages/e2e-tests/test-applications/react-router-7-framework-instrumentation/app/entry.client.tsx
@@ -27,7 +27,7 @@ startTransition(() => {
     document,
     <StrictMode>
       {/* unstable_instrumentations is React Router 7.x's prop name (will become `instrumentations` in v8) */}
-      <HydratedRouter unstable_instrumentations={sentryClientInstrumentation} />
+      <HydratedRouter unstable_instrumentations={sentryClientInstrumentation} onError={Sentry.sentryOnError} />
     </StrictMode>,
   );
 });
diff --git a/dev-packages/e2e-tests/test-applications/react-router-7-framework-instrumentation/app/root.tsx b/dev-packages/e2e-tests/test-applications/react-router-7-framework-instrumentation/app/root.tsx
index 227c08f7730c..bc1b8f1236c0 100644
--- a/dev-packages/e2e-tests/test-applications/react-router-7-framework-instrumentation/app/root.tsx
+++ b/dev-packages/e2e-tests/test-applications/react-router-7-framework-instrumentation/app/root.tsx
@@ -1,4 +1,3 @@
-import * as Sentry from '@sentry/react-router';
 import { Links, Meta, Outlet, Scripts, ScrollRestoration, isRouteErrorResponse } from 'react-router';
 import type { Route } from './+types/root';
 import stylesheet from './app.css?url';
@@ -48,7 +47,6 @@ export function ErrorBoundary({ error }: Route.ErrorBoundaryProps) {
     message = error.status === 404 ? '404' : 'Error';
     details = error.status === 404 ? 'The requested page could not be found.' : error.statusText || details;
   } else if (error && error instanceof Error) {
-    Sentry.captureException(error);
     if (import.meta.env.DEV) {
       details = error.message;
       stack = error.stack;
diff --git a/dev-packages/e2e-tests/test-applications/react-router-7-framework-node-20-18/app/entry.client.tsx b/dev-packages/e2e-tests/test-applications/react-router-7-framework-node-20-18/app/entry.client.tsx
index 925c1e6ab143..005268b40ad0 100644
--- a/dev-packages/e2e-tests/test-applications/react-router-7-framework-node-20-18/app/entry.client.tsx
+++ b/dev-packages/e2e-tests/test-applications/react-router-7-framework-node-20-18/app/entry.client.tsx
@@ -17,7 +17,7 @@ startTransition(() => {
   hydrateRoot(
     document,
     <StrictMode>
-      <HydratedRouter />
+      <HydratedRouter onError={Sentry.sentryOnError} />
     </StrictMode>,
   );
 });
diff --git a/dev-packages/e2e-tests/test-applications/react-router-7-framework-node-20-18/app/root.tsx b/dev-packages/e2e-tests/test-applications/react-router-7-framework-node-20-18/app/root.tsx
index 227c08f7730c..bc1b8f1236c0 100644
--- a/dev-packages/e2e-tests/test-applications/react-router-7-framework-node-20-18/app/root.tsx
+++ b/dev-packages/e2e-tests/test-applications/react-router-7-framework-node-20-18/app/root.tsx
@@ -1,4 +1,3 @@
-import * as Sentry from '@sentry/react-router';
 import { Links, Meta, Outlet, Scripts, ScrollRestoration, isRouteErrorResponse } from 'react-router';
 import type { Route } from './+types/root';
 import stylesheet from './app.css?url';
@@ -48,7 +47,6 @@ export function ErrorBoundary({ error }: Route.ErrorBoundaryProps) {
     message = error.status === 404 ? '404' : 'Error';
     details = error.status === 404 ? 'The requested page could not be found.' : error.statusText || details;
   } else if (error && error instanceof Error) {
-    Sentry.captureException(error);
     if (import.meta.env.DEV) {
       details = error.message;
       stack = error.stack;
diff --git a/dev-packages/e2e-tests/test-applications/react-router-7-framework-node-20-18/tests/errors/errors.client.test.ts b/dev-packages/e2e-tests/test-applications/react-router-7-framework-node-20-18/tests/errors/errors.client.test.ts
index d6c80924c121..c1a7de46f1b6 100644
--- a/dev-packages/e2e-tests/test-applications/react-router-7-framework-node-20-18/tests/errors/errors.client.test.ts
+++ b/dev-packages/e2e-tests/test-applications/react-router-7-framework-node-20-18/tests/errors/errors.client.test.ts
@@ -100,7 +100,8 @@ test.describe('client-side errors', () => {
             type: 'Error',
             value: errorMessage,
             mechanism: {
-              handled: true,
+              handled: false,
+              type: 'auto.function.react_router.on_error',
             },
           },
         ],
@@ -127,7 +128,8 @@ test.describe('client-side errors', () => {
             type: 'Error',
             value: errorMessage,
             mechanism: {
-              handled: true,
+              handled: false,
+              type: 'auto.function.react_router.on_error',
             },
           },
         ],
diff --git a/dev-packages/e2e-tests/test-applications/react-router-7-framework-spa-node-20-18/app/entry.client.tsx b/dev-packages/e2e-tests/test-applications/react-router-7-framework-spa-node-20-18/app/entry.client.tsx
index 223c8e6129dd..f9e8c5139d22 100644
--- a/dev-packages/e2e-tests/test-applications/react-router-7-framework-spa-node-20-18/app/entry.client.tsx
+++ b/dev-packages/e2e-tests/test-applications/react-router-7-framework-spa-node-20-18/app/entry.client.tsx
@@ -17,7 +17,7 @@ startTransition(() => {
   hydrateRoot(
     document,
     <StrictMode>
-      <HydratedRouter />
+      <HydratedRouter onError={Sentry.sentryOnError} />
     </StrictMode>,
   );
 });
diff --git a/dev-packages/e2e-tests/test-applications/react-router-7-framework-spa-node-20-18/app/root.tsx b/dev-packages/e2e-tests/test-applications/react-router-7-framework-spa-node-20-18/app/root.tsx
index 194d91eea422..2a3279aed365 100644
--- a/dev-packages/e2e-tests/test-applications/react-router-7-framework-spa-node-20-18/app/root.tsx
+++ b/dev-packages/e2e-tests/test-applications/react-router-7-framework-spa-node-20-18/app/root.tsx
@@ -2,7 +2,6 @@ import { isRouteErrorResponse, Links, Meta, Outlet, Scripts, ScrollRestoration }
 
 import type { Route } from './+types/root';
 import './app.css';
-import * as Sentry from '@sentry/react-router';
 
 export function Layout({ children }: { children: React.ReactNode }) {
   return (
@@ -35,8 +34,6 @@ export function ErrorBoundary({ error }: Route.ErrorBoundaryProps) {
     message = error.status === 404 ? '404' : 'Error';
     details = error.status === 404 ? 'The requested page could not be found.' : error.statusText || details;
   } else if (error && error instanceof Error) {
-    Sentry.captureException(error);
-
     details = error.message;
     stack = error.stack;
   }
diff --git a/dev-packages/e2e-tests/test-applications/react-router-7-framework-spa-node-20-18/tests/errors/errors.client.test.ts b/dev-packages/e2e-tests/test-applications/react-router-7-framework-spa-node-20-18/tests/errors/errors.client.test.ts
index d6c80924c121..c1a7de46f1b6 100644
--- a/dev-packages/e2e-tests/test-applications/react-router-7-framework-spa-node-20-18/tests/errors/errors.client.test.ts
+++ b/dev-packages/e2e-tests/test-applications/react-router-7-framework-spa-node-20-18/tests/errors/errors.client.test.ts
@@ -100,7 +100,8 @@ test.describe('client-side errors', () => {
             type: 'Error',
             value: errorMessage,
             mechanism: {
-              handled: true,
+              handled: false,
+              type: 'auto.function.react_router.on_error',
             },
           },
         ],
@@ -127,7 +128,8 @@ test.describe('client-side errors', () => {
             type: 'Error',
             value: errorMessage,
             mechanism: {
-              handled: true,
+              handled: false,
+              type: 'auto.function.react_router.on_error',
             },
           },
         ],
diff --git a/dev-packages/e2e-tests/test-applications/react-router-7-framework-spa/app/entry.client.tsx b/dev-packages/e2e-tests/test-applications/react-router-7-framework-spa/app/entry.client.tsx
index 7448ebe7bfe2..249e18d27c08 100644
--- a/dev-packages/e2e-tests/test-applications/react-router-7-framework-spa/app/entry.client.tsx
+++ b/dev-packages/e2e-tests/test-applications/react-router-7-framework-spa/app/entry.client.tsx
@@ -17,7 +17,7 @@ startTransition(() => {
   hydrateRoot(
     document,
     <StrictMode>
-      <HydratedRouter />
+      <HydratedRouter onError={Sentry.sentryOnError} />
     </StrictMode>,
   );
 });
diff --git a/dev-packages/e2e-tests/test-applications/react-router-7-framework-spa/app/root.tsx b/dev-packages/e2e-tests/test-applications/react-router-7-framework-spa/app/root.tsx
index 194d91eea422..2a3279aed365 100644
--- a/dev-packages/e2e-tests/test-applications/react-router-7-framework-spa/app/root.tsx
+++ b/dev-packages/e2e-tests/test-applications/react-router-7-framework-spa/app/root.tsx
@@ -2,7 +2,6 @@ import { isRouteErrorResponse, Links, Meta, Outlet, Scripts, ScrollRestoration }
 
 import type { Route } from './+types/root';
 import './app.css';
-import * as Sentry from '@sentry/react-router';
 
 export function Layout({ children }: { children: React.ReactNode }) {
   return (
@@ -35,8 +34,6 @@ export function ErrorBoundary({ error }: Route.ErrorBoundaryProps) {
     message = error.status === 404 ? '404' : 'Error';
     details = error.status === 404 ? 'The requested page could not be found.' : error.statusText || details;
   } else if (error && error instanceof Error) {
-    Sentry.captureException(error);
-
     details = error.message;
     stack = error.stack;
   }
diff --git a/dev-packages/e2e-tests/test-applications/react-router-7-framework-spa/tests/errors/errors.client.test.ts b/dev-packages/e2e-tests/test-applications/react-router-7-framework-spa/tests/errors/errors.client.test.ts
index d6c80924c121..c1a7de46f1b6 100644
--- a/dev-packages/e2e-tests/test-applications/react-router-7-framework-spa/tests/errors/errors.client.test.ts
+++ b/dev-packages/e2e-tests/test-applications/react-router-7-framework-spa/tests/errors/errors.client.test.ts
@@ -100,7 +100,8 @@ test.describe('client-side errors', () => {
             type: 'Error',
             value: errorMessage,
             mechanism: {
-              handled: true,
+              handled: false,
+              type: 'auto.function.react_router.on_error',
             },
           },
         ],
@@ -127,7 +128,8 @@ test.describe('client-side errors', () => {
             type: 'Error',
             value: errorMessage,
             mechanism: {
-              handled: true,
+              handled: false,
+              type: 'auto.function.react_router.on_error',
             },
           },
         ],
diff --git a/dev-packages/e2e-tests/test-applications/react-router-7-framework/app/entry.client.tsx b/dev-packages/e2e-tests/test-applications/react-router-7-framework/app/entry.client.tsx
index 925c1e6ab143..005268b40ad0 100644
--- a/dev-packages/e2e-tests/test-applications/react-router-7-framework/app/entry.client.tsx
+++ b/dev-packages/e2e-tests/test-applications/react-router-7-framework/app/entry.client.tsx
@@ -17,7 +17,7 @@ startTransition(() => {
   hydrateRoot(
     document,
     <StrictMode>
-      <HydratedRouter />
+      <HydratedRouter onError={Sentry.sentryOnError} />
     </StrictMode>,
   );
 });
diff --git a/dev-packages/e2e-tests/test-applications/react-router-7-framework/app/root.tsx b/dev-packages/e2e-tests/test-applications/react-router-7-framework/app/root.tsx
index 227c08f7730c..bc1b8f1236c0 100644
--- a/dev-packages/e2e-tests/test-applications/react-router-7-framework/app/root.tsx
+++ b/dev-packages/e2e-tests/test-applications/react-router-7-framework/app/root.tsx
@@ -1,4 +1,3 @@
-import * as Sentry from '@sentry/react-router';
 import { Links, Meta, Outlet, Scripts, ScrollRestoration, isRouteErrorResponse } from 'react-router';
 import type { Route } from './+types/root';
 import stylesheet from './app.css?url';
@@ -48,7 +47,6 @@ export function ErrorBoundary({ error }: Route.ErrorBoundaryProps) {
     message = error.status === 404 ? '404' : 'Error';
     details = error.status === 404 ? 'The requested page could not be found.' : error.statusText || details;
   } else if (error && error instanceof Error) {
-    Sentry.captureException(error);
     if (import.meta.env.DEV) {
       details = error.message;
       stack = error.stack;
diff --git a/dev-packages/e2e-tests/test-applications/react-router-7-framework/tests/errors/errors.client.test.ts b/dev-packages/e2e-tests/test-applications/react-router-7-framework/tests/errors/errors.client.test.ts
index d6c80924c121..c1a7de46f1b6 100644
--- a/dev-packages/e2e-tests/test-applications/react-router-7-framework/tests/errors/errors.client.test.ts
+++ b/dev-packages/e2e-tests/test-applications/react-router-7-framework/tests/errors/errors.client.test.ts
@@ -100,7 +100,8 @@ test.describe('client-side errors', () => {
             type: 'Error',
             value: errorMessage,
             mechanism: {
-              handled: true,
+              handled: false,
+              type: 'auto.function.react_router.on_error',
             },
           },
         ],
@@ -127,7 +128,8 @@ test.describe('client-side errors', () => {
             type: 'Error',
             value: errorMessage,
             mechanism: {
-              handled: true,
+              handled: false,
+              type: 'auto.function.react_router.on_error',
             },
           },
         ],
diff --git a/packages/react-router/src/client/index.ts b/packages/react-router/src/client/index.ts
index 6734b21c8583..24431843710c 100644
--- a/packages/react-router/src/client/index.ts
+++ b/packages/react-router/src/client/index.ts
@@ -31,3 +31,5 @@ export {
   isNavigateHookInvoked,
   type CreateSentryClientInstrumentationOptions,
 } from './createClientInstrumentation';
+
+export { sentryOnError } from './sentryOnError';
diff --git a/packages/react-router/src/client/sentryOnError.ts b/packages/react-router/src/client/sentryOnError.ts
new file mode 100644
index 000000000000..bf6d8108565d
--- /dev/null
+++ b/packages/react-router/src/client/sentryOnError.ts
@@ -0,0 +1,36 @@
+import { captureException } from '@sentry/core';
+import { captureReactException } from '@sentry/react';
+
+/**
+ * A handler function for React Router's `onError` prop on `HydratedRouter`.
+ *
+ * Reports errors to Sentry.
+ *
+ * @example (entry.client.tsx)
+ * ```tsx
+ * import { sentryOnError } from '@sentry/react-router';
+ *
+ * startTransition(() => {
+ *   hydrateRoot(
+ *     document,
+ *     <HydratedRouter onError={sentryOnError} />
+ *   );
+ * });
+ * ```
+ */
+export function sentryOnError(
+  error: unknown,
+  {
+    errorInfo,
+  }: {
+    errorInfo?: React.ErrorInfo;
+  },
+): void {
+  const mechanism = { handled: false, type: 'auto.function.react_router.on_error' };
+
+  if (errorInfo) {
+    captureReactException(error, errorInfo, { mechanism });
+  } else {
+    captureException(error, { mechanism });
+  }
+}
diff --git a/packages/react-router/test/client/sentryOnError.test.ts b/packages/react-router/test/client/sentryOnError.test.ts
new file mode 100644
index 000000000000..33df01858288
--- /dev/null
+++ b/packages/react-router/test/client/sentryOnError.test.ts
@@ -0,0 +1,38 @@
+import * as SentryCore from '@sentry/core';
+import * as SentryReact from '@sentry/react';
+import { afterEach, describe, expect, it, vi } from 'vitest';
+import { sentryOnError } from '../../src/client/sentryOnError';
+
+const captureReactExceptionSpy = vi.spyOn(SentryReact, 'captureReactException').mockReturnValue('mock-event-id');
+const captureExceptionSpy = vi.spyOn(SentryCore, 'captureException').mockReturnValue('mock-event-id');
+
+describe('sentryOnError', () => {
+  afterEach(() => {
+    vi.clearAllMocks();
+  });
+
+  it('calls captureReactException when errorInfo is provided', () => {
+    const error = new Error('test error');
+    const errorInfo = { componentStack: '<TestComponent>\n<App>' };
+
+    sentryOnError(error, {
+      errorInfo,
+    });
+
+    expect(captureReactExceptionSpy).toHaveBeenCalledWith(error, errorInfo, {
+      mechanism: { handled: false, type: 'auto.function.react_router.on_error' },
+    });
+    expect(captureExceptionSpy).not.toHaveBeenCalled();
+  });
+
+  it('calls captureException when errorInfo is undefined', () => {
+    const error = new Error('loader error');
+
+    sentryOnError(error, {});
+
+    expect(captureExceptionSpy).toHaveBeenCalledWith(error, {
+      mechanism: { handled: false, type: 'auto.function.react_router.on_error' },
+    });
+    expect(captureReactExceptionSpy).not.toHaveBeenCalled();
+  });
+});