Section 16 Trail is a four mile loop (more like a square actually) in Black Forest. There are no big hills but it is very undulating and provides an excellent workout. Trialhead with Parking is located on Burgess Road but there are other access points as well. This is a popular trail for Horseriding, hiking and mountain biking and of course running.
Cache is located not far off the trail and should be an easy find.
Other Trail Run Caches to try:
GC58ZCG Palmer Divide Trail
GC59M2B Dawson Butte
GC5A429 Spruce Mountain
GC5BP1Q Lincoln Mountain
GC6250Y Pikes Peak Loop