Sneffels Highline Trail

Overview

Spectacular high ridge walk along the spine of the Sneffels Range. The route crosses Mears Pass, traverses high alpine ridges with continuous views of the Sneffels group, and descends into a glacial cirque. A classic San Juan backcountry day. The full route covers 13 miles as a loop with about 3,300 feet of climbing, and most hikers finish it in around 9 hours. It sits in the San Juan Mountains, near Telluride in San Miguel County, topping out at 13,140 feet.

Trail Highlights

How Hard Is It?

This is rated hard. The big 13-mile distance paired with serious 3,300 feet of gain is what sets the effort level. It runs as a loop, so you get new scenery the whole way and finish back at the trailhead. You are hiking near 14er altitude up here, so expect the thin air to slow you down well before your legs do. If you hike regularly, plan for roughly 9 hours of moving time; add a buffer for photos, snack stops, and the slower pace at altitude.

Best Time to Hike

The best seasons here are summer and fall. Summer is the reliable window once the snow clears, though that also means the busiest trailheads and the daily afternoon thunderstorm risk. In Colorado the weather turns fast in the high country, so start early, aim to be heading down by early afternoon, and watch the sky. Lightning, not distance, is what turns most summer hikes around.

Getting to the Trailhead

The trailhead is in the San Juan Mountains, closest to Telluride (San Miguel County). No pass or permit is required to park, though popular lots still fill early on summer weekends. The parking coordinates are 37.9417, -107.8136; plug those into your map app rather than the trail name, since several Colorado trailheads share names. Mountain weather and road closures can change access, so confirm the access road is open before a long drive.

Dogs & Kids

Dogs are allowed, and they should stay leashed to protect wildlife and other hikers. It is a tough one for young kids given the 13 miles and 3,300 feet of gain. Save it for older, trail-tested kids or go without them.

What to Pack

Pack the Colorado basics: more water than you expect, layers for a 30-degree temperature swing, sun protection for the high-altitude UV, and rain protection for the afternoon. For a big, serious hike like this one, the gear that earns its weight most is sturdy footwear and poles. Here is what we actually recommend for trails like this:

• ›hiking boots with real traction
• ›a packable rain shell
• ›trekking poles for the climb and descent
• ›a water filter for the longer day
• ›microspikes for snow and ice
• ›an insulating layer for the summit

Frequently Asked Questions