The Colorado State Muzzleloading Association site lists a host of clubs, but all are on the Eastern slope of the Rockies. Grand Junction is on the Western Slope, many hours drive from these clubs.
There are often local groups who just are not organized into a specific ML gun club, but shoot at local ranges, and often have one day a month where they have priority use of the range facility. Others meet and shoot at private homes, and ranches.
A check with local gun stores, and even the police agencies will often turn up information on where a local group of shooters meet.
My brother and a friend just began a new BP gun club near Tallahassee, Florida, by advertising a shoot on a specific weekend each month after getting board approval from their local rifle and pistol club. Apparently, a club for BP shooters had existed at that club for years, but fell apart some years before my brother moved to Tallahassee. They have been slowly building interest in MLers, and putting signs up in local gun stores, all to get notice out to potential shooters.
Sometimes, you have to start your own club, when you move to a new place. " If you build it, they will come." :thumbsup: