Cairn Mountain
12,221 ft | 1 trails | Montana
12,221 ft
1 routes
Moderate
About Cairn Mountain
Cairn Mountain rises to 12,221 feet in Montana.
When to Go
The reliable snow-free window is roughly July through September. At this elevation, afternoon thunderstorms are a serious summer hazard — start early and plan to be off the upper mountain by midday. Outside that window expect snow travel and bring traction and navigation skills to match.
Know Before You Go
Download the GPX track from this page before you go — cell coverage is unreliable in the mountains and a saved route works offline in any GPS app. Conditions change: verify current access, closures and weather with the official land manager before you go. Trail data is sourced from OpenStreetMap contributors (ODbL).
Looking to link objectives or plan a weekend? Nearby summits include Granite Peak, Tempest Mountain and Mount Villard — each has its own guide on this site.
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Check Current Conditions
Trail conditions change frequently. Check the official land manager's site (linked under Data Sources on this page) and the NWS forecast before your hike.
Frequently Asked Questions
Are dogs allowed on the Cairn Mountain trail?
Rules vary by land manager — national parks often prohibit dogs on trails, while most national forests allow them on leash. Check with the managing agency for this trail before bringing your dog, and pack out waste.
When is the best time to hike Cairn Mountain?
July through September is the reliable snow-free window. Start early to avoid afternoon thunderstorms above treeline.
How tall is Cairn Mountain?
Cairn Mountain stands at 12,221 feet (3,725 meters) in Montana.
Safety Information
Current Hazards
- Afternoon thunderstorms
- Dehydration risk
- UV exposure above treeline
Turn-Around Time
1:00 PM (2:00 PM summer)
Plan to reach the summit by this time to allow safe descent before dark.
Essential Gear Checklist
* Critical items - do not hike without these
Emergency Contacts
Emergency / Search & Rescue
911Summit Forecast
NWS Point Forecast →In most of the US, backcountry search and rescue is dispatched through 911 — tell the operator you have a hiker emergency and your GPS coordinates.
Nearby Peaks
Explore other mountains near Cairn Mountain. Great for peak-bagging or planning your next adventure.
Granite Peak
12,807 ft
Tempest Mountain
12,438 ft
Mount Villard
12,254 ft
Granite Peak (Northwest Peak)
12,736 ft
Peak Bagging Tip
Granite Peak is only 1.2 miles away. Consider combining these peaks for a bigger day or overnight trip!