You are looking for a small waterproof container at an overlook on a little used trail. I have included a spoiler photo.
A pipeline was built to deliver water from Rosemont Reservoir to Colorado Springs in the 1930s. The trail runs next to the pipeline and you will see exposed parts of it and at times you can hear the water running through it. South of the cache the trail is covered by downed trees and becomes very difficult to follow.
Follow Old Stage road to Road 372 and go south to the parking coords. There are numerous camping spots along the road. You will need a car with some clearance but 4WD is not necessary if it is dry. Puddles on the road usually have a solid bottom but the mud off the side of the road can be deep. I had to help pull someone out once that got stuck just off the road.
Additional Waypoints
P077NXV - Parking
N 38° 43.063 W 104° 57.907
T077NXV - TH
N 38° 43.083 W 104° 57.771