Tucson Trail Runners (TTR) is a trail/ultra running group that focuses on long-distance trail runs on public lands in all five mountain ranges surrounding Tucson, Arizona.  The average distance for our runs is 17 to 20 miles with many in the ultra distance range.  TTR meets almost weekly on Sundays from September through the beginning of July.  If you are interested in running with TTR, please read The Series to determine if your experience matches the difficulty of our runs.