There is a FSSP parish in Fountain, CO which is on the south side of Colorado Springs. In between C. Springs and Pueblo, you should be able to find some pieces of land.
There is another FSSP parish in Littleton which is south Denver but it is smack in the city and all that area is growing like mad.
There is to be a FSSP community formed in Ft. Collins and there is land to build there. They have the TLM on the First Sunday of the month at this time but I hear it is to expand to weekly and then one day there will be a full parish life. One can still find land there too.
As far as I know there are NO Latin Masses in the diocese of Pueblo at this time and probably not for a time to come.
As far as small mountain town communities, I have not heard of any that are regular TLM at all. It is expensive-naturally- to live in those areas. But coming from California, it may seem reasonable...
There is also some TLMs to be found around Santa Fe in New Mexico as well. Santa Fe is trendy and expensive but outlying areas are more reasonable,
By all means, get out of California! Come east, young man!