diff --git a/ixmp4/core/run.py b/ixmp4/core/run.py
index dceddd56..57aa38c2 100644
--- a/ixmp4/core/run.py
+++ b/ixmp4/core/run.py
@@ -71,7 +71,7 @@ def meta(self, meta):
         self._meta._set(meta)
 
     def set_as_default(self):
-        """Sets this run as the default version for its `model` + `scenario` combination."""
+        """Sets this run as default version for this `model - scenario` combination."""
         self.backend.runs.set_as_default_version(self._model.id)
 
     def unset_as_default(self):
@@ -80,20 +80,16 @@ def unset_as_default(self):
 
 
 class RunRepository(BaseFacade):
-    def list(self, default_only: bool = True) -> Iterable[Run]:
+    def list(self, default_only: bool = True, **kwargs) -> Iterable[Run]:
         return [
             Run(_backend=self.backend, _model=r)
-            for r in self.backend.runs.list(default_only=default_only)
+            for r in self.backend.runs.list(default_only=default_only, **kwargs)
         ]
 
-    def tabulate(self, default_only: bool = True) -> pd.DataFrame:
-        runs = self.backend.runs.tabulate(default_only=default_only)
-        runs["model"] = runs["model__id"].map(
-            dict([(m.id, m.name) for m in self.backend.models.list()])
-        )
-        runs["scenario"] = runs["scenario__id"].map(
-            dict([(s.id, s.name) for s in self.backend.scenarios.list()])
-        )
+    def tabulate(self, default_only: bool = True, **kwargs) -> pd.DataFrame:
+        runs = self.backend.runs.tabulate(default_only=default_only, **kwargs)
+        runs["model"] = runs["model__id"].map(self.backend.models.map())
+        runs["scenario"] = runs["scenario__id"].map(self.backend.scenarios.map())
         return runs[["id", "model", "scenario", "version", "is_default"]]
 
 
diff --git a/ixmp4/data/abstract/model.py b/ixmp4/data/abstract/model.py
index 276a3eba..4e6b7d91 100644
--- a/ixmp4/data/abstract/model.py
+++ b/ixmp4/data/abstract/model.py
@@ -113,3 +113,13 @@ def tabulate(
 
         """
         ...
+
+    def map(self, *args, **kwargs) -> dict:
+        """Return a mapping of model-id to model-name.
+
+        Returns
+        -------
+        :class:`dict`:
+            A dictionary `id` -> `name`
+        """
+        return dict([(m.id, m.name) for m in self.list(*args, **kwargs)])
diff --git a/ixmp4/data/abstract/scenario.py b/ixmp4/data/abstract/scenario.py
index cce305cc..89a4b56b 100644
--- a/ixmp4/data/abstract/scenario.py
+++ b/ixmp4/data/abstract/scenario.py
@@ -105,3 +105,13 @@ def tabulate(
                 - name
         """
         ...
+
+    def map(self, *args, **kwargs) -> dict:
+        """Return a mapping of scenario-id to scenario-name.
+
+        Returns
+        -------
+        :class:`dict`
+            A dictionary `id` -> `name`
+        """
+        return dict([(s.id, s.name) for s in self.list(*args, **kwargs)])
diff --git a/tests/data/test_model.py b/tests/data/test_model.py
index ef83527b..c9a9458a 100644
--- a/tests/data/test_model.py
+++ b/tests/data/test_model.py
@@ -56,6 +56,11 @@ def test_tabulate_model(self, test_mp):
             models.drop(columns=["created_at", "created_by"]), true_models
         )
 
+    def test_map_model(self, test_mp):
+        test_mp.Run("Model 1", "Scenario", version="new")
+        test_mp.Run("Model 2", "Scenario", version="new")
+        assert test_mp.backend.models.map() == {1: "Model 1", 2: "Model 2"}
+
     def test_filter_model(self, test_mp):
         run1, _ = create_filter_test_data(test_mp)
 
diff --git a/tests/data/test_scenario.py b/tests/data/test_scenario.py
index d6359d33..68a92b87 100644
--- a/tests/data/test_scenario.py
+++ b/tests/data/test_scenario.py
@@ -57,6 +57,12 @@ def test_tabulate_scenario(self, test_mp):
             scenarios.drop(columns=["created_at", "created_by"]), true_scenarios
         )
 
+    def test_map_scenario(self, test_mp):
+        test_mp.Run("Model", "Scenario 1", version="new")
+        test_mp.Run("Model", "Scenario 2", version="new")
+
+        assert test_mp.backend.scenarios.map() == {1: "Scenario 1", 2: "Scenario 2"}
+
     def test_filter_scenario(self, test_mp):
         run1, _ = create_filter_test_data(test_mp)