diff --git a/README.md b/README.md
index 6b9bdd6..d559425 100644
--- a/README.md
+++ b/README.md
@@ -357,6 +357,8 @@ export const handle: SitemapHandle<SitemapData> = {
 }
 ```
 
+This applies to all routes, including `root.tsx`. The `root.tsx` sitemap function acts as a fallback and will run for any route that does not define its own sitemap handle.
+
 ### Handling sitemap index + dynamic sitemaps + robots.txt
 
 If you want to generate different sitemaps based on the language you can use the following approach:
diff --git a/src/remix/sitemap.ts b/src/remix/sitemap.ts
index 33a4281..ce2695b 100644
--- a/src/remix/sitemap.ts
+++ b/src/remix/sitemap.ts
@@ -42,6 +42,11 @@ const createExtendedRoutes = (routes: RouteManifest<InternalServerRoute | undefi
 		}
 	})
 }
+
+const hasSitemapHandle = (handle: unknown): handle is { sitemap: SitemapFunction<unknown> } => {
+	return Boolean(handle && typeof handle === "object" && "sitemap" in handle && typeof handle.sitemap === "function")
+}
+
 const generateRemixSitemapRoutes = async ({
 	domain,
 	sitemapData,
@@ -54,21 +59,32 @@ const generateRemixSitemapRoutes = async ({
 	// Add the url to each route
 	const extendedRoutes = createExtendedRoutes(routes)
 
+	const rootRoute = extendedRoutes.find(({ id }) => id === "root")
+	const rootHandle = rootRoute?.module?.handle
+
+	const hasRootHandle = hasSitemapHandle(rootHandle)
+
 	const transformedRoutes = await Promise.all(
 		extendedRoutes.map(async (route) => {
-			const url = route.url
 			// We don't want to include the root route in the sitemap
 			if (route.id === "root") return
-			// If the route has a module, get the handle
+
+			const url = route.url
 			const handle = route.module?.handle
-			// If the route has a sitemap function, call it and return the sitemap entries
-			if (handle && typeof handle === "object" && "sitemap" in handle && typeof handle.sitemap === "function") {
-				// Type the function just in case
-				const sitemap = handle.sitemap as SitemapFunction<unknown>
-				const sitemapEntries: SitemapFunctionReturnData = await sitemap(domain, url, sitemapData)
+
+			// Run the route sitemap function if it exists
+			if (hasSitemapHandle(handle)) {
+				const sitemapEntries = await handle.sitemap(domain, url, sitemapData)
+				return { url, sitemapEntries, id: route.id }
+			}
+
+			// As a fallback run the root route sitemap function
+			if (hasRootHandle) {
+				const sitemapEntries = await rootHandle.sitemap(domain, url, sitemapData)
 				return { url, sitemapEntries, id: route.id }
 			}
-			// Otherwise, just return the route as a single entry
+
+			// If no sitemap function was found, just return the route as a single entry
 			return { url, sitemapEntries: null, id: route.id }
 		})
 	)