This one looks similar to L. delicioso, but is defiintely not. One big difference is that the cap is slimy. Found on the trail to Opal Lake, in very southern Colorado.
I agree with Phishfinder's alluded-ID re the yellow stem base - we found a few of these this weekend :-) frog
MycoRob: Nice work. In North American Mushrooms/Miller, 3 Chroogomphus are listed: C. tomentosus, C. vinicolor, C. ochraseus. Based on the color in the photos, I'd have to go with C. tomentosus, which doesn't get mentioned in Mushrooms of Colorado/Evenson. I saw this both in northern NM and southern CO in the past couple weeks. These are quite distinctive, I can't think of anything I would mistake them for, can you? It also lists all 3 species as edible. Have you tried them?
i'll check my list of 1500 species of CO fungi to see what other Chroogomphus we've found, and which we find most often. I have had them (the entire taxonomic family is edible!), but found them mediocre at best.
I believe that Frog is referring to Gomphidius subroseus, which is what it looks like to me. However, in Colorado it could be another species of similar appearance.