diff --git a/courses/serializers/v2/courses.py b/courses/serializers/v2/courses.py
index 7d6ea481c0..44a408fe28 100644
--- a/courses/serializers/v2/courses.py
+++ b/courses/serializers/v2/courses.py
@@ -277,8 +277,9 @@ class CourseWithCourseRunsSerializer(CourseSerializer):
 
     @extend_schema_field(CourseRunSerializer(many=True))
     def get_courseruns(self, instance):
-        # Use prefetched course runs to preserve prefetched products
-        courseruns = instance.courseruns.all()
+        # Use prefetched course runs to preserve prefetched products, but
+        # restrict to runs that are currently enrollable.
+        courseruns = instance.courseruns.enrollable().all()
         if "org_id" in self.context:
             courseruns = [
                 run
diff --git a/courses/serializers/v2/courses_test.py b/courses/serializers/v2/courses_test.py
index 1179bc8ded..b864e9da48 100644
--- a/courses/serializers/v2/courses_test.py
+++ b/courses/serializers/v2/courses_test.py
@@ -141,6 +141,24 @@ def test_serialize_course_required_prerequisites(
     )
 
 
+def test_course_with_course_runs_only_includes_enrollable_runs(mock_context, settings):
+    """CourseWithCourseRunsSerializer should only return enrollable course runs."""
+    # Create a course with two runs: one enrollable (default factory), one not enrollable
+    enrollable_run = CourseRunFactory.create()
+    course = enrollable_run.course
+
+    # Make a non-enrollable run for the same course by setting enrollment_end in the past
+    non_enrollable_run = CourseRunFactory.create(
+        course=course, past_enrollment_end=True
+    )
+
+    data = CourseWithCourseRunsSerializer(instance=course, context=mock_context).data
+
+    # Only the enrollable run should be present
+    returned_run_ids = {run["id"] for run in data["courseruns"]}
+    assert returned_run_ids == {enrollable_run.id}
+
+
 class TestCourseRunEnrollmentSerializerV2:
     """Test the v2 CourseRunEnrollmentSerializer."""