The Colorado vs Idaho poll is heavily in favor of Colorado so lets get the ball rolling on where to go, etc. I looked at my book last night and there are a few areas that I think would work:
Buena Vista / Monarch
I have heard talk of some big dawgs wanting to do Iron Chest. Old Tin Ccup Pass would also be suitable for the big dawgs. Other than that there is not much challenge except for high narrow shelf roads. For the stockers there are tons of easy to difficult trail choices. I believe this was the location for CCR99.
Pikes Peak Region
This area looks cool but there are only 7 trails in the area. Longwater Gulch and Hackett Gulch are the only big dawg trails there although a group trip up Mt Baldy would be good as well. The rest of the trails are rated easy.
Ouray
Tons of trails, even if someone has done trails there, there are still numerous trail choices. My personal agenda would be Corkscrew gulch, California gulch, nellie creek, stony pass, black bear pass, minnie and maggie gulch and others if time permits. Big dawg challenges would be Poughkeepsie Gulch and black bear pass (b/c of the technical aspect of it) or a trip up to Montrose for the real challenges.
Crested Butte, Aspen and Marble
A little farther of a drive for some of us but some good trails such as Schofield Pass (Devils Punch Bowl). Limited stock trails - mostly rated easy trails. Bottom line is it is either difficult or easy trails.
That about takes care of the choices I had in mind. Does someone want to put these in a poll? Also some pre- running might be needed for some of these trails.