At about 4:00 am on April 7, while marching through the foothills, Captain Whitlock noticed campfires in the distance and he immediately assumed it to be an Apache camp. Quickly Whitlock advanced his troop to the camp where around 250 Apaches warriors were resting with the herd of livestock. Whitlock decided to separate his command into a few groups to surround the camp, they would then attack at first light. So when the sun rose above the horizon, the American soldiers began their assault. The captain led the charge into the Apache camp which was defended by the Chiricahua for over an hour before they retreated up the mountain. When the Americans were finally in control, they set fire to the wickiups and destroyed about 300 pounds of dried mescal, an Apache food source. While burning the mescal, thirty of the retreating Apaches turned around and attacked the soldiers to try to stop the destruction of their food but they were driven off by effective volleys of rifle fire. Twenty-one Apaches were killed and left on the field, others were wounded but escaped and forty-five horses and mules were captured. There were no American casualties.
The battle at Mount Gray was one of the more significant engagements fought between the California Column and the Apache. Similar to the earlier Battle of Apache Pass, the Californians were outnumbered but managed to defeat a larger force of hardened warriors.