From here it's about another mile or so to the top of Anthracite Pass (you can camp in the trees here if you like and there are some nice spots that are well used by horseback riders). Continuing straight over the top will take you down towards the Kebler Pass/Crested Butte side towards Ruby/Dark Canyon, etc. Or from the top of Anthracite Pass look for a faint trail that veers to the right towards the cliffy ridge. This will take you through the trees and then switch back up to the top of the Raspberry Creek ridge. From here the views of the Raggeds, Chair Mountain, Liberty Bell Peak, Treasure Vault Mountain, Yule Creek, and the Elks towards Crystal/Snowmass Mountain are awesome. You can climb out on the Raggeds Trail if you like or continue the loop by continuing on the ridge until it begins to descend towards Raspberry Creek.
Once down in the valley below the ridge (also a place you could camp) the trail traverses to the right and goes around the bend back towards the Quarry Road drainage. After a bit you will come to a trail junction and you can either go right and finish the middle portion of the Raspberry Creek loop by ending up by climbing back to Anthracite Pass and out to your car at the Yule Creek trailhead or go left and end up back on the Quarry Road and your car at the Raspberry Creek trailhead. You can also do this loop the other way if you like.
A third option is to do the whole loop (without the Yule Creek section), from the Raspberry Creek trailhead so you won't have to shuttle a vehicle up the road (but it depends on whether you want to visit the Marble mine on the way out). This whole loop (no matter which way you do it) is around 9-10 miles I believe.
And yes I would recommend hanging your packs or using canisters as they don't call this Raspberry Creek for nothing (and the bears know it too)!
A good place to start for maps and more trail info that I've added here is Warren Olrich's hiking guides Aspen & Central Colorado Trails and Aspen/Snowmass Trails both available locally or from Amazon.com
Have fun!
kaiman

