James Peak via St. Mary's Glacier
James Peak via St. Mary's Glacier
4.8
(7336)
7,337
runners
02:25
13.1km
870m
Running
If you're seeking a high-alpine adventure with truly expansive views, the James Peak via St. Mary's Glacier trail delivers a challenging experience. This difficult route takes you from a rocky jeep road past the stunning St. Mary's Lake and its namesake glacier, then through alpine tundra to the summit of…
Last updated: June 9, 2026
Tips
Your route passes through protected areas
Please check local regulations for:
James Peak Wilderness
Waypoints
Start point
Parking
223 m
Highlight • Trail
Tip by
1.04 km
Highlight • Lake
Tip by
1.62 km
Highlight • Natural Monument
Tip by
6.46 km
Highlight • Summit
Tip by
13.1 km
End point
Parking
Way Types & Surfaces
Way Types
6.01 km
3.03 km
1.88 km
1.78 km
355 m
Surfaces
7.74 km
3.88 km
756 m
355 m
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Tuesday 13 October
8°C
1°C
66 %
Additional weather tips
Max wind speed: 7.0 km/h
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This route was planned by komoot.
Parking is available at the Saint Mary's Glacier Trailhead. It's a very popular spot, especially on weekends. An insider tip is to arrive early, ideally before 7 AM, to secure a parking space, as it fills up quickly.
Yes, there is a fee required to park at the trailhead for the Saint Mary's Glacier Trailhead. This area is part of the James Peak Wilderness, and while a specific wilderness permit for hiking is not typically required, parking fees help maintain the facilities and access. You can find more details on the Colorado state website: colorado.gov.
Yes, the trail is generally dog-friendly. However, as it passes through the James Peak Wilderness, dogs must be kept on a leash at all times to protect wildlife and ensure a pleasant experience for all hikers. Be aware that the terrain is very rocky and steep in many sections, which can be challenging for some dogs.
The best time to hike this trail is typically from late spring to early fall (June through September). During this period, the snow has usually melted enough to make the route more accessible, and you might catch wildflowers in the alpine meadows. However, even in summer, be prepared for rapidly changing weather conditions, including afternoon thunderstorms, and always check the forecast before you go.
The terrain is varied and challenging. It starts with a short paved section, then transitions to a very rocky old jeep road leading to Saint Mary's Lake. Beyond the lake, the path becomes narrower and steeper, especially as it approaches the Saint Mary's Snowfield, where you might encounter soft, damp ground or remnant snow. The final push to James Peak involves loose rocks and scree, with sections of high-alpine tundra in between.
This trail is generally not suitable for jogging or beginners. While the very initial paved section might allow for light trail running, the majority of the route, especially from Saint Mary's Lake upwards, is extremely rocky, steep, and uneven. The presence of the Saint Mary's Snowfield and loose scree near the summit makes it difficult and potentially dangerous for running. It's rated as difficult and is best suited for experienced hikers.
You'll encounter several notable features. The hike begins at the Saint Mary's Glacier Trailhead, leading to the picturesque Saint Mary's Lake. Further up, you'll reach the Saint Mary's Snowfield (often referred to as a glacier). The ultimate destination is the summit of James Peak, offering spectacular panoramic views of the Continental Divide and surrounding peaks.
From the 13,271-foot summit of James Peak, you can expect breathtaking 360-degree panoramic views. These include expansive vistas of the Front Range, the Indian Peaks Wilderness, and the Continental Divide. You'll be able to spot numerous other prominent peaks like Mount Bancroft, Parry Peak, Square Top Mountain, Argentine Peak, Mount Edwards, Grays Peak, Torreys Peak, and Grizzly Peak.
Yes, the route to James Peak via St. Mary's Glacier intersects with and follows sections of several other trails. Notably, it utilizes parts of the CDT - Colorado Section, James Peak South, St Marys Glacier Hike, and James Peak Trail. These intersections can offer opportunities for extended adventures or alternative routes if you are familiar with the area.
Given the challenging nature and high altitude of this trail, it's crucial to pack appropriately. Bring sturdy hiking boots with good ankle support, plenty of water, snacks, and layers of clothing as weather can change rapidly. Trekking poles are highly recommended for stability on the steep and rocky sections. Don't forget sun protection (sunscreen, hat, sunglasses) and a map or GPS device, as well as an ice axe if you plan to traverse the snowfield when conditions warrant.
Yes, the trail starts at over 10,000 feet, and the summit of James Peak is at 13,271 feet. Many hikers will feel the effects of altitude, such as shortness of breath or headaches. It's recommended to take it slow, stay hydrated, and consider acclimatizing for a day or two at a lower elevation if you're coming from sea level. If you experience severe symptoms of altitude sickness, descend immediately.
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