diff --git a/geotrek/api/v2/views/outdoor.py b/geotrek/api/v2/views/outdoor.py
index 37bd380c5f..0ce360926a 100644
--- a/geotrek/api/v2/views/outdoor.py
+++ b/geotrek/api/v2/views/outdoor.py
@@ -23,10 +23,12 @@ def get_queryset(self):
         activate(self.request.GET.get('language'))
         return outdoor_models.Site.objects \
             .annotate(geom_transformed=Transform(F('geom'), settings.API_SRID)) \
+            .select_related('parent', 'practice', 'type') \
             .prefetch_related(Prefetch('attachments',
                                        queryset=Attachment.objects.select_related('license', 'filetype', 'filetype__structure')),
                               Prefetch('view_points',
-                                       queryset=HDViewPoint.objects.select_related('content_type', 'license').annotate(geom_transformed=Transform(F('geom'), settings.API_SRID)))) \
+                                       queryset=HDViewPoint.objects.select_related('content_type', 'license').annotate(geom_transformed=Transform(F('geom'), settings.API_SRID))),
+                              'information_desks', 'labels', 'managers', 'pois_excluded', 'portal', 'ratings', 'source', 'themes', 'web_links') \
             .order_by('name')  # Required for reliable pagination
 
 
@@ -93,6 +95,10 @@ def get_queryset(self):
         activate(self.request.GET.get('language'))
         return outdoor_models.Course.objects \
             .annotate(geom_transformed=Transform(F('geom'), settings.API_SRID)) \
+            .select_related('type') \
             .prefetch_related(Prefetch('attachments',
-                                       queryset=Attachment.objects.select_related('license', 'filetype', 'filetype__structure'))) \
+                                       queryset=Attachment.objects.select_related('license', 'filetype', 'filetype__structure')),
+                              Prefetch('course_children', queryset=outdoor_models.OrderedCourseChild.objects.select_related('parent', 'child')),
+                              Prefetch('course_parents', queryset=outdoor_models.OrderedCourseChild.objects.select_related('parent', 'child')),
+                              'parent_sites', 'pois_excluded', 'ratings') \
             .order_by('name')  # Required for reliable pagination