37,953 mapped trails and 3,112 federal parks across 4 states. A complete regional guide.
The Mountain West is the country's highest-elevation hiking region and arguably its most photographed. Colorado contains 58 peaks above 14,000 feet — the country's densest concentration. Montana holds Glacier National Park and the Bob Marshall Wilderness Complex. Wyoming holds the Tetons, Yellowstone, and the Wind River Range (in the eyes of many serious backpackers, the country's most beautiful alpine wilderness). Utah compresses red-rock canyon country, the Wasatch and Uinta alpine ranges, and Great Basin desert into one state.
What unifies the region is altitude. Most multi-day routes sit above 9,000 feet for days at a time. Afternoon thunderstorms are reliable July through August. Snowfields linger into July on north-facing slopes. The hiking calendar is short and intense: most high-country routes are accessible only from mid-July through mid-September.
The region's signature long-distance trails are the Continental Divide Trail (running through all four states), the Colorado Trail (486 miles in Colorado), and various unofficial routes like the Wind River High Route. These attract hikers from every other US region.
By the numbers
37,953Mapped trails
3,112Federal parks
4States covered
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Altitude management
Hikers from sea level routinely underestimate the Mountain West. Altitude sickness symptoms (headache, nausea, fatigue) appear above 8,000 feet for unacclimatized visitors. The fix is straightforward: spend a night at moderate elevation (5,000-7,000 ft) before attempting anything above 10,000 ft, drink more water than you think, and don't ascend more than 1,000 ft per night above 8,000 ft on multi-day trips.
Acetazolamide (Diamox) is a prescription option for hikers genuinely affected by altitude. Most Sierra and Cascade hikers will be fine without it. Sea-level visitors to the Wind Rivers or Colorado fourteeners may benefit from a prescription before the trip.
Lightning and afternoon thunderstorms
Summer afternoon thunderstorms in the Mountain West are not optional weather — they're the climate pattern. Plan to be off exposed ridges, summits, and above-treeline terrain by noon, every day, July through August. Watch for cumulonimbus building vertically by mid-morning. If you can see thunderheads anywhere within 30 miles, the storm is close enough to threaten you within an hour.
Lightning kills more US hikers per year than any other weather hazard, and a disproportionate share of those fatalities are in the Mountain West.
Grizzly country: the Greater Yellowstone Ecosystem
Montana, Wyoming, and eastern Idaho are grizzly country. The current population of ~1,000 grizzlies in the Greater Yellowstone Ecosystem and ~1,000+ in the Northern Continental Divide Ecosystem means encounters happen. Carry bear spray (not a sidearm — bear spray has been studied and works better), know how to use it, and follow Leave No Trace bear-canister rules in backcountry campsites.
Most grizzly attacks involve surprise encounters at close range. Make noise on trail in dense brush, hike in groups when possible, and never run from a bear that has noticed you.
Marquee parks and wildernesses
Colorado: Rocky Mountain NP (timed entry summer), Great Sand Dunes, Mesa Verde, Black Canyon. Indian Peaks, Maroon Bells-Snowmass, and Weminuche Wilderness areas are world-class.
Montana: Glacier NP (timed entry summer), Yellowstone (mostly Wyoming, with Montana frontage), Bob Marshall and Beartooth Wildernesses.
Wyoming: Yellowstone, Grand Teton, Devils Tower. Wind River, Cloud Peak, and Gros Ventre Wildernesses.
Utah: Zion, Bryce Canyon, Capitol Reef, Arches, Canyonlands. Wasatch and Uinta high country.
States in this region
Each state page is a hub for county-level, city-level, and individual trail detail — plus state-specific ranked guides.
The Mountain West is where most American hikers eventually want to go. Plan early — timed-entry permits for Rocky Mountain, Glacier, and Zion fill within weeks. Drill into the state pages below for trail-level detail, county breakdowns, and individual trail pages with current weather forecasts.
