diff --git a/difi/metrics.py b/difi/metrics.py
index 85c7fac..6649b1f 100644
--- a/difi/metrics.py
+++ b/difi/metrics.py
@@ -1028,8 +1028,9 @@ def run(
         by_object: bool = False,
         ignore_after_discovery: bool = False,
         num_jobs: Optional[int] = 1,
+        return_summary: bool = True,
         clear_on_failure: bool = True,
-    ) -> Tuple[pd.DataFrame, pd.DataFrame]:
+    ) -> Tuple[pd.DataFrame, Optional[pd.DataFrame]]:
         """
         Run the findability metric on the observations.
 
@@ -1070,6 +1071,9 @@ def run(
         num_jobs : int, optional
             The number of jobs to run in parallel. If 1, then run in serial. If None, then use the number of
             CPUs on the machine.
+        return_summary : bool, optional
+            If True, then return a summary of the number of observations, number of findable
+            objects and the start and end night of each window.
         clear_on_failure : bool, optional
             If a failure occurs and this is False, then the shared memory array will not be cleared.
             If True, then the shared memory array will be cleared.
@@ -1116,7 +1120,10 @@ def run(
                 clear_on_failure=clear_on_failure,
             )
 
-        window_summary = self._create_window_summary(observations, windows, findable)
+        if return_summary:
+            window_summary = self._create_window_summary(observations, windows, findable)
+        else:
+            window_summary = None
         return findable, window_summary
 
 
diff --git a/difi/tests/test_metrics.py b/difi/tests/test_metrics.py
index bcecfc1..c9d97fc 100644
--- a/difi/tests/test_metrics.py
+++ b/difi/tests/test_metrics.py
@@ -1,6 +1,7 @@
 import os
 
 import numpy as np
+import pandas as pd
 import pytest
 
 from ..metrics import (
@@ -522,3 +523,14 @@ def test_FindabilityMetrics_shared_memory(test_observations):
     assert metric._shared_memory_name is None
     assert metric._num_observations == 0
     assert metric._dtypes is None
+
+
+def test_FindabilityMetrics_run_return_summary(test_observations):
+    # Check that the function returns the summary dataframe when desired
+    metric = MinObsMetric()
+
+    findable, window_summary = metric.run(test_observations, return_summary=True)
+    assert isinstance(window_summary, pd.DataFrame)
+
+    findable, window_summary = metric.run(test_observations, return_summary=False)
+    assert window_summary is None