Boulder's Mesa Trail: The Best Trail Run Above the City
6.8 miles (one-way) / 13.6 miles (out-and-back) · 800 ft gain
The Mesa Trail runs along the base of the Flatirons for 6.8 miles with constant views of Boulder's iconic rock formations. It's flat enough to run fast, technical enough to stay interesting, and beautiful enough to make every mile feel like a reward.