This cache is at the abandoned Roosevelt mine near Pitkin, Co. Park at mile marker 12 on the SE side of the road to Pitkin. Start at the fisherman's trail (38 deg. 34.395' N; 106 deg. 33.183' W). Hike on foot from here. Follow the trail. Go over a wooden bridge. Continue until you arrive at an old hydro-electric building for mining along Quartz Creek. At this point, follow the trail upwards to the east. Continue along higher trail that follows Quartz Creek. Look for a broken-down wooden railroad bridge on the trail. Hike across this on the trail that is evident. Continue to the other side, where you will see rounded metal rods sticking out of the ground that look like the "ribs of a whale". Hike through the whales stomach! On the other side, you can hike upward easily to a wider trail bed a level up and head in the southern direction. Follow the trail bed (it will switch back to the north). You will walk by an old guard shack that has now collapsed. Continue on until you come to the grand entrance to the Roosevelt mine. The cache is hidden here. It is a clear rubbermaid container. It contains various treasures. The location of the cache was moved in 2020 to a more secure (and hidden) location. The hint below should help.
Additional Info: Abandoned in 1919, Roosevelt Mine is a lost treasure of Gunnison County, Colorado. Exactly three miles outside the tiny town of Ohio City is the unmarked trailhead on the side of a road pull off for Roosevelt the mine. The trail boasts amazing views of both the surrounding mountains and Quartz Creek. As the trail ascends, there are several structures which used to provide power to the tiny mining communities back in the early 1900s. None of these structures are off limits and hikers can explore them more deeply just by stepping off the side of the trail. Here is more history, if interested.