🏃 Route Info
🗺️ Trail Map
Boulder, Colorado is one of the top trail running cities in the United States, and the Mesa Trail is its crown jewel. Running north-south along the base of the Flatirons on the edge of Boulder's mountain parks, this 6.8-mile trail connects South Mesa Trailhead to Chautauqua and links to dozens of side trails leading up into the mountains. For a run that's both accessible and genuinely satisfying, it's hard to beat.
The Route
Most runners start at South Mesa Trailhead off Eldorado Springs Drive and run north to Chautauqua Park, making it an approximately 6.8-mile one-way run (13.6 miles out-and-back if you return). A car shuttle makes the one-way version easier. The trail rolls along the base of the range, dipping into creek drainages and rising over small ridges — never brutally hard, but consistently engaging.
Side trail options add variety: Big Bluestem Trail cuts east through open meadows, Towhee Trail and Shadow Canyon climb steeply into the Flatirons for anyone wanting to add serious elevation. The trail system is well-signed and easy to navigate.
What Makes It Great
The Mesa Trail strikes a rare balance — runnable terrain (no prolonged technical scrambling), sustained mountain views, and enough surface variety (hard-pack dirt, rocks, creek crossings) to keep your attention engaged for the full run. You're also virtually never in dense forest, which means views of the Flatirons are with you for most of the route.
Tips
- Parking: South Mesa Trailhead fills early on weekends. Arrive before 8 AM or take the Skip bus from downtown Boulder.
- Altitude: Starting elevation around 5,600 ft. Visitors from sea level will feel it on the first run — slow down and drink extra water.
- Wildlife: Rattlesnakes are present May–October. Watch where you step and don't put hands near rocks you can't see under.
- Dogs on leash in all Boulder mountain parks.
- Year-round running — the trail is accessible in winter but can be icy. Yak Trax or microspikes help on cold mornings.
Gear Picks
- Cushioned trail running shoes — the rocky sections reward a bit of protection
- Soft-flask vest for runs longer than an hour
- Running sunglasses — UV is intense above 5,000 ft
- Gels or chews for the return leg
Getting There
South Mesa Trailhead: 3.5 miles south of downtown Boulder on Eldorado Springs Drive (CO-170). Free parking; get there early on weekends. Chautauqua Park (north end) has paid parking and a restaurant for post-run pancakes.
The Verdict
The Mesa Trail is Boulder trail running distilled to its essence — big views, runnable surface, and enough elevation and technical terrain to make you work for it. It's the run locals do when they want something reliable and beautiful, and visitors should make it a priority.