Colorado · Hiking
Hiking in Keystone, Colorado
Keystone sits at the base of the Snake River valley in Summit County, and its trail network is more varied than most visitors expect.
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Keystone sits at the base of the Snake River valley in Summit County, and its trail network is more varied than most visitors expect. The 103 hiking routes here range from flat valley walks to ridge connectors that push into serious terrain, and the mix reflects that — Easy Street and Valley Floor are genuinely approachable for families or anyone still adjusting to altitude, while trails like Monkey Butt, High Speed Dirt, and Power Hair attract hikers who want something with more bite. A handful of routes follow old road grades — Keystone Gulch Road, Montezuma Road, and Frey Gulch Road among them — which makes for wide, well-defined paths that are easy to navigate but still climb steadily into the surrounding mountains. The River Run Trail and West Ridge Connector are good options if you want to link segments into a longer day without repeating ground. Because Keystone sits above 9,000 feet, even the easier-rated trails like Let it Ride and Wide Open Trail will feel harder than their difficulty labels suggest if you're coming from lower elevation. Plan for afternoon thunderstorms from July through early September, start early, and carry layers regardless of the morning forecast.
Frequently asked questions
When does the hiking season typically run in Keystone?
Most trails are accessible from late May or early June through October, depending on snowpack. Higher routes and ridge connectors like the West Ridge Connector often hold snow into June, so lower valley and road-grade trails such as Keystone Gulch Road and Montezuma Road tend to open first. By mid-July the bulk of the network is clear and hikeable.
Are there good options for beginners or hikers not used to altitude?
Yes — Easy Street, Valley Floor, River Run Trail, and the road-grade routes like Let it Ride, Wide Open Trail, and Crossover Road are all rated easy and stay on relatively gentle terrain. That said, Keystone's base elevation means even flat trails will feel more demanding than they look on paper, so give yourself a day to acclimatize before pushing into moderate terrain like the Red Trail.
What time of day should I start hiking to avoid afternoon thunderstorms?
Start by 7 or 8 a.m. if you're planning anything beyond a short valley walk. Summer storms in Summit County typically build between noon and 3 p.m. and can move in fast. Trails that gain elevation quickly or put you on exposed ridgelines are the highest-risk spots, so plan to be descending by midday during July and August.
Do I need a permit or pass to hike in Keystone?
Most of the trails in the Keystone area do not require a permit for day hiking, but some routes cross private resort land or White River National Forest, and access rules can vary. Check current conditions with the Dillon Ranger District before your trip, particularly for less-traveled routes like Pah-Qwun Trail or Aldasoro Trail where signage may be limited.
What gear should I bring for a day hike here?
Bring a rain jacket even on clear mornings — afternoon storms are a near-daily occurrence in summer. Layers matter because temperatures can swing 30 degrees between early morning and midday. Sun protection is essential at this elevation, and trekking poles are worth considering on steeper routes like Butcher's Hook or Holy Roller where loose trail surface is common. Carry more water than you think you need; the dry mountain air accelerates dehydration.
