GTR Mapping was started in late 1984, the owner having been an exploration geologist with extensive traveling throughout the Rocky Mountain region during the previous 16 years.  GTR's first published map was in 1985, the Colorado Geologic Highway Map.  GTR has evolved along with the drastic changes in the mapping industry, starting with manual cartography, now using computers and digital files for map compilation and printing.  However, our specialty continues to be paper maps that deliver as much information as practical in the most readible and attractive format possible.

We are constantly collecting, reviewing, and organizing information for map updating and compilation.  A few of the sources we access for information includes the departments of transportation, State Parks, Fish & Game, U. S. Forest Service, BLM, National Parks, U. S. Fish &  Wildlife, Bureau of Reclamation, Corps of Engineers, Census Bureau, chambers of commerce, visitors bureaus, etc.  A considerable amount of field checking has also been done to verify some of the data.  We appreciate any feedback; please drop us a line or an email.