diff --git a/apps/journal/app/lib/activities.server.ts b/apps/journal/app/lib/activities.server.ts
index 2fc336e..ca7523c 100644
--- a/apps/journal/app/lib/activities.server.ts
+++ b/apps/journal/app/lib/activities.server.ts
@@ -1,7 +1,7 @@
 import { randomUUID } from "node:crypto";
-import { eq, desc, sql } from "drizzle-orm";
+import { eq, desc, and, sql } from "drizzle-orm";
 import { getDb } from "./db.ts";
-import { activities, routes } from "@trails-cool/db/schema/journal";
+import { activities, routes, syncImports } from "@trails-cool/db/schema/journal";
 import { parseGpxAsync } from "@trails-cool/gpx";
 import { setGeomFromGpx } from "./routes.server.ts";
 
@@ -61,7 +61,26 @@ export async function getActivity(id: string) {
   const [activity] = await db.select().from(activities).where(eq(activities.id, id));
   if (!activity) return null;
   const geojson = await getActivityGeojson(id);
-  return { ...activity, geojson };
+  const importSource = await getImportSource(id);
+  return { ...activity, geojson, importSource };
+}
+
+export async function deleteActivity(id: string, ownerId: string): Promise<boolean> {
+  const db = getDb();
+  const [activity] = await db.select({ id: activities.id }).from(activities)
+    .where(and(eq(activities.id, id), eq(activities.ownerId, ownerId)));
+  if (!activity) return false;
+  await db.delete(activities).where(eq(activities.id, id));
+  return true;
+}
+
+async function getImportSource(activityId: string): Promise<{ provider: string; externalWorkoutId: string } | null> {
+  const db = getDb();
+  const [row] = await db
+    .select({ provider: syncImports.provider, externalWorkoutId: syncImports.externalWorkoutId })
+    .from(syncImports)
+    .where(eq(syncImports.activityId, activityId));
+  return row ?? null;
 }
 
 export async function listActivities(ownerId: string) {
diff --git a/apps/journal/app/lib/sync/imports.server.ts b/apps/journal/app/lib/sync/imports.server.ts
index 7eddfa6..2be87c1 100644
--- a/apps/journal/app/lib/sync/imports.server.ts
+++ b/apps/journal/app/lib/sync/imports.server.ts
@@ -38,6 +38,11 @@ export async function isAlreadyImported(
   return !!row;
 }
 
+export async function deleteImportByActivity(activityId: string) {
+  const db = getDb();
+  await db.delete(syncImports).where(eq(syncImports.activityId, activityId));
+}
+
 export async function getImportedIds(
   userId: string,
   provider: string,
diff --git a/apps/journal/app/routes/activities.$id.tsx b/apps/journal/app/routes/activities.$id.tsx
index 0d32446..2ddb6f5 100644
--- a/apps/journal/app/routes/activities.$id.tsx
+++ b/apps/journal/app/routes/activities.$id.tsx
@@ -1,8 +1,10 @@
 import { Suspense, lazy } from "react";
 import { data, redirect } from "react-router";
+import { useTranslation } from "react-i18next";
 import type { Route } from "./+types/activities.$id";
 import { getSessionUser } from "~/lib/auth.server";
-import { getActivity, linkActivityToRoute, createRouteFromActivity } from "~/lib/activities.server";
+import { getActivity, deleteActivity, linkActivityToRoute, createRouteFromActivity } from "~/lib/activities.server";
+import { deleteImportByActivity } from "~/lib/sync/imports.server";
 import { listRoutes } from "~/lib/routes.server";
 import { ClientDate } from "~/components/ClientDate";
 
@@ -33,6 +35,7 @@ export async function loader({ params, request }: Route.LoaderArgs) {
       geojson: activity.geojson ?? null,
       startedAt: activity.startedAt?.toISOString() ?? null,
       createdAt: activity.createdAt.toISOString(),
+      importSource: activity.importSource,
     },
     isOwner,
     routes: userRoutes.map((r) => ({ id: r.id, name: r.name })),
@@ -60,6 +63,13 @@ export async function action({ params, request }: Route.ActionArgs) {
     return data({ error: "No GPX data to create route from" }, { status: 400 });
   }
 
+  if (intent === "delete") {
+    await deleteImportByActivity(params.id);
+    const deleted = await deleteActivity(params.id, user.id);
+    if (deleted) return redirect("/activities");
+    return data({ error: "Activity not found" }, { status: 404 });
+  }
+
   return data({ error: "Unknown action" }, { status: 400 });
 }
 
@@ -70,10 +80,18 @@ export function meta({ data: loaderData }: Route.MetaArgs) {
 
 export default function ActivityDetailPage({ loaderData }: Route.ComponentProps) {
   const { activity, isOwner, routes } = loaderData;
+  const { t } = useTranslation("journal");
 
   return (
     <div className="mx-auto max-w-4xl px-4 py-8">
-      <h1 className="text-2xl font-bold text-gray-900">{activity.name}</h1>
+      <div className="flex items-center gap-3">
+        <h1 className="text-2xl font-bold text-gray-900">{activity.name}</h1>
+        {activity.importSource && (
+          <span className="inline-flex items-center rounded-full bg-blue-50 px-2.5 py-0.5 text-xs font-medium text-blue-700">
+            {t("activities.importedFrom", { provider: activity.importSource.provider })}
+          </span>
+        )}
+      </div>
       {activity.description && (
         <p className="mt-2 text-gray-600">{activity.description}</p>
       )}
@@ -128,7 +146,7 @@ export default function ActivityDetailPage({ loaderData }: Route.ComponentProps)
               <input type="hidden" name="intent" value="link-route" />
               <div className="flex-1">
                 <label htmlFor="routeId" className="block text-sm font-medium text-gray-700">
-                  Link to existing route
+                  {t("activities.linkToRoute")}
                 </label>
                 <select
                   id="routeId"
@@ -158,12 +176,26 @@ export default function ActivityDetailPage({ loaderData }: Route.ComponentProps)
                 type="submit"
                 className="rounded-md border border-gray-300 px-3 py-2 text-sm text-gray-700 hover:bg-gray-50"
               >
-                Create Route from Activity
+                {t("activities.createRouteFromActivity")}
               </button>
             </form>
           )}
         </div>
       )}
+
+      {isOwner && (
+        <div className="mt-8 border-t border-gray-200 pt-6">
+          <form method="post" onSubmit={(e) => { if (!confirm(t("activities.deleteConfirm"))) e.preventDefault(); }}>
+            <input type="hidden" name="intent" value="delete" />
+            <button
+              type="submit"
+              className="rounded-md border border-red-200 px-3 py-2 text-sm text-red-600 hover:bg-red-50"
+            >
+              {t("activities.delete")}
+            </button>
+          </form>
+        </div>
+      )}
     </div>
   );
 }
diff --git a/apps/journal/app/routes/sync.import.$provider.tsx b/apps/journal/app/routes/sync.import.$provider.tsx
index 5d01e62..d4fd492 100644
--- a/apps/journal/app/routes/sync.import.$provider.tsx
+++ b/apps/journal/app/routes/sync.import.$provider.tsx
@@ -128,7 +128,17 @@ export default function SyncImportPage({ loaderData, actionData }: Route.Compone
               className="flex items-center justify-between rounded-lg border border-gray-200 p-4"
             >
               <div>
-                <p className="font-medium text-gray-900">{w.name}</p>
+                <div className="flex items-center gap-2">
+                  <p className="font-medium text-gray-900">{w.name}</p>
+                  {!w.fileUrl && (
+                    <span
+                      className="inline-flex items-center rounded-full bg-amber-50 px-2 py-0.5 text-xs font-medium text-amber-700"
+                      title={t("sync.noGpsTooltip", { provider: provider.name })}
+                    >
+                      {t("sync.noGps")}
+                    </span>
+                  )}
+                </div>
                 <div className="mt-1 flex gap-3 text-sm text-gray-500">
                   {w.startedAt && <ClientDate iso={w.startedAt} />}
                   {w.distance != null && <span>{(w.distance / 1000).toFixed(1)} km</span>}
diff --git a/packages/i18n/src/locales/de.ts b/packages/i18n/src/locales/de.ts
index cd90218..f4c8f65 100644
--- a/packages/i18n/src/locales/de.ts
+++ b/packages/i18n/src/locales/de.ts
@@ -134,6 +134,9 @@ export default {
       duration: "Dauer",
       linkToRoute: "Mit Route verknüpfen",
       createRouteFromActivity: "Route aus Aktivität erstellen",
+      delete: "Aktivität löschen",
+      deleteConfirm: "Möchtest du diese Aktivität wirklich löschen?",
+      importedFrom: "Importiert von {{provider}}",
     },
     settings: {
       title: "Einstellungen",
@@ -181,6 +184,8 @@ export default {
       importFrom: "Import von {{provider}}",
       imported: "Importiert",
       noWorkouts: "Keine Workouts gefunden.",
+      noGps: "Kein GPS",
+      noGpsTooltip: "{{provider}} stellt für diese Aktivität keine Routendaten bereit",
       previous: "Zurück",
       next: "Weiter",
     },
diff --git a/packages/i18n/src/locales/en.ts b/packages/i18n/src/locales/en.ts
index 30fe2ec..fdd94ab 100644
--- a/packages/i18n/src/locales/en.ts
+++ b/packages/i18n/src/locales/en.ts
@@ -134,6 +134,9 @@ export default {
       duration: "Duration",
       linkToRoute: "Link to Route",
       createRouteFromActivity: "Create Route from Activity",
+      delete: "Delete Activity",
+      deleteConfirm: "Are you sure you want to delete this activity?",
+      importedFrom: "Imported from {{provider}}",
     },
     settings: {
       title: "Settings",
@@ -181,6 +184,8 @@ export default {
       importFrom: "Import from {{provider}}",
       imported: "Imported",
       noWorkouts: "No workouts found.",
+      noGps: "No GPS",
+      noGpsTooltip: "{{provider}} does not provide route data for this activity",
       previous: "Previous",
       next: "Next",
     },