If this is the Cache Creek 'twinxt Buena Vista and Leadville, I used to pan/sluice it back in the early '80's while I was stationed at Ft. Carson. I knew nothing of prospecting at the time (still know very little) other than what I'd read, but still had a good time and found good color. I had a vial full of fines and flakes, even a few small pickers, but one of my boys ('bout three years old) got a'hold of it, opened it, and strew it on the carpet. Very small recovery from THAT..... but I still have a corner of the vial.....
I drove north from Buena Vista, towards Leadville, turned off just north of the bridge crossing the creek, and headed "up country" to the west in a '76 Pontiac Le Mans until I couldn't go no mo.... I beat the dickens outta that car up there.....
There were lots of coyote holes along the high banks of the creek. I'd stay out of them, we had one cave on us.... we were young and stupid, but no one was injured. The coyote holes didn't yield much in the way of panning material, but if the larger rocks were bristle brushed into a bucket of water and then panned we got lots of small flakes and an occasional picker. Just about every pan of gravel from the creek would yield color, but it was fine. Lots of black sand, but it did hold color.
I could only get a couple or three miles west of the highway in the LaMans, but there was a crew farther upstream who had a dozer up there and were removing overburden, working the bedrock, and doing rather well. I saw some really nice nuggets they'd recovered.
There were lots of cut-throat trout in the creek then, 6-12 inches long. They would bite anything thrown into the water. Ate a bunch of camp fire cooked trout on those weekends.
The remains of old flumes were all along the southern ridge above the creek. I didn't check the higher banks, didn't know to, and didn't use a metal detector. Would like to nugget shoot the area knowing what I do now. Keep it in mind.....
Good luck, stay safe, and let us know how you do up there.
Let me know if there's still trout in the stream.....
Robin