On June 3rd, M and I troops arrived at Three Rivers (Kaweah). As the senior officer present, Captain Young achieved another first for a Black officer, being appointed as "Acting Superintendent" of Sequoia and the smaller adjacent General Grant National Park (later renamed Kings Canyon).
Young immediately set his troops to work establishing a general supply camp. Detachments were sent to Cedar Creek, Cold Spring, Clough's Cave, and General Grant to begin patrols. Their mission was the same as that of Troops K and L at Yosemite, to "enforce the rules and regulations of the Department of the Interior" and to secure the Park from "injury and depredations."
Fire watches were established. The use of firearms was restricted and the regulation strictly enforced. After their required "annual target practice" the soldiers boxed and put away their carbines, only carrying them on patrols passing outside park boundaries.
Captain Young quickly sent a detachment to the foot of Mount Whitney, where their patrols prevented herders and their sheep from entering the meadows. As a result, tourists en route to the high country found plenty of grass for their animals to graze.
The 9th Cavalry also constructed, repaired, and improved the parks' roads and trails. Beginning in June, Captain Young put his men hard to work. Progress was rapid despite the rough and rocky terrain. In a job that required both skill and hard labor, forty to fifty men and up to twelve horses labored through the season to construct more miles of road than in the past three seasons combined.
Over one hundred years later the road that Captain Young's men helped build is still used as a Sequoia National Park hiking trail.