diff --git a/src/apphosting/backend.ts b/src/apphosting/backend.ts
index db2228fb8b8..056f2786a32 100644
--- a/src/apphosting/backend.ts
+++ b/src/apphosting/backend.ts
@@ -134,12 +134,21 @@ export async function doSetup(
     if (nonInteractive) {
       runtime = DEFAULT_RUNTIME;
     } else {
+      const choices: Choice<string>[] = [{ name: "Node.js (default)", value: DEFAULT_RUNTIME }];
+      try {
+        const supportedRuntimes = await apphosting.listSupportedRuntimes(projectId, location);
+        for (const r of supportedRuntimes) {
+          if (r.runtimeId !== DEFAULT_RUNTIME) {
+            choices.push({ name: r.runtimeId, value: r.runtimeId });
+          }
+        }
+      } catch (err) {
+        logWarning("Failed to list supported runtimes. Falling back to default.");
+      }
+
       runtime = await select({
         message: "Which runtime do you want to use?",
-        choices: [
-          { name: "Node.js (default)", value: DEFAULT_RUNTIME },
-          { name: "Node.js 22", value: "nodejs22" },
-        ],
+        choices: choices,
         default: DEFAULT_RUNTIME,
       });
     }
diff --git a/src/gcp/apphosting.spec.ts b/src/gcp/apphosting.spec.ts
index f2d4ab97184..6840e81657b 100644
--- a/src/gcp/apphosting.spec.ts
+++ b/src/gcp/apphosting.spec.ts
@@ -278,5 +278,17 @@ describe("apphosting", () => {
         queryParams: { pageToken: "2" },
       });
     });
+
+    it("lists supported runtimes", async () => {
+      get.resolves({
+        body: {
+          supportedRuntimes: [{ runtimeId: "nodejs22" }],
+        },
+      });
+      await expect(apphosting.listSupportedRuntimes("p", "l")).to.eventually.deep.equal([
+        { runtimeId: "nodejs22" },
+      ]);
+      expect(get).to.have.been.calledWithMatch("projects/p/locations/l/supportedRuntimes");
+    });
   });
 });
diff --git a/src/gcp/apphosting.ts b/src/gcp/apphosting.ts
index 9392d985443..d007a9250a2 100644
--- a/src/gcp/apphosting.ts
+++ b/src/gcp/apphosting.ts
@@ -58,6 +58,18 @@ export interface Backend {
   automaticBaseImageUpdatesDisabled?: boolean;
 }
 
+export interface SupportedRuntime {
+  name: string;
+  runtimeId: string;
+  automaticBaseImageUpdatesSupported: boolean;
+  deprecateTime?: string;
+  decommissionTime?: string;
+}
+
+export interface ListSupportedRuntimesResponse {
+  supportedRuntimes: SupportedRuntime[];
+}
+
 export interface ManagedResource {
   runService: { service: string };
 }
@@ -711,6 +723,18 @@ export async function listLocations(projectId: string): Promise<Location[]> {
   return locations;
 }
 
+/**
+ * Lists supported runtimes for a given project and location.
+ */
+export async function listSupportedRuntimes(
+  projectId: string,
+  location: string,
+): Promise<SupportedRuntime[]> {
+  const name = `projects/${projectId}/locations/${location}/supportedRuntimes`;
+  const res = await client.get<ListSupportedRuntimesResponse>(name);
+  return res.body.supportedRuntimes || [];
+}
+
 /**
  * Ensure that the App Hosting API is enabled on the project.
  */