What's new

October 2026

• Explore on the map

  A full-screen map with trails in view, filters with a live count, place search, contours, 3D terrain and satellite.

• Real elevation

  Elevation gain, loss, high and low points and a profile chart for nearly every Boulder trail, computed from the U.S. Geological Survey's public elevation model.

• Along the way

  Mapped viewpoints, peaks, waterfalls, water, parking, toilets, camp sites and climbing areas on each trail, with where they sit along the route.

• Trail features and effort

  Browse by dogs, wheelchair access, surface, bikes, horses, views and more. Effort is computed from length and climb; it is not an official difficulty.

• Areas and official links

  Pages for Boulder County, towns, parks and forests, each linking to the managing agency for parking, fees and permits.

• Miles by default

  Distances and elevations show in miles and feet, with a one-tap switch to kilometres and metres.

• Route builder, GPX and print

  Draw your own route, snap it to trails, and download GPX. Trail pages print cleanly.

• Weather, sunrise and sunset

  A 7-day forecast from the U.S. National Weather Service and computed sunrise and sunset at the trailhead.

• Lists, trips, journal and reviews

  Save trails, make private lists, plan trips with a safety checklist, keep a nature journal with private photos, and post dated condition reports.

• Plant identification

  Photograph a plant and get ranked suggestions. Suggestions are never proof.