4.7
(2059)
17,846
hikers
01:50
5.43km
460m
Hiking
Lace up your boots for the Sawtooth Lake Trail, a moderate hike that takes you deep into the Beaverhead-Deerlodge National Forest. You will cover 3.4 miles (5.4 km) with a steady climb of 1503 feet (458 metres), typically completed in about 1 hour and 49 minutes. The path winds through forests of lodgepole pine before opening up to reveal stunning views of serrated granite ridges, leading you to the pristine, glacier-carved Sawtooth Lake nestled below Mount Regan.
Planning your visit is key for this alpine adventure. The best time to experience the trail is usually from July through September, as snow can linger into early summer and return by October due to the high elevation. Remember that you will need a free wilderness permit to hike here, and campfires are not allowed at Sawtooth Lake to protect the fragile environment.
This route is a highlight for anyone seeking a classic mountain experience, offering a chance to see smaller lakes and tarns along the way. The deep blue waters of Sawtooth Lake, set against the imposing 10,190-foot Mount Regan, create a truly memorable destination. It is a rewarding journey that showcases the rugged beauty of the region.
Last updated: April 23, 2026
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5.41 km
Highlight • Lake
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5.43 km
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Way Types
5.39 km
< 100 m
Surfaces
5.39 km
< 100 m
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The trail starts at the Iron Creek trailhead, which is a very popular access point. Due to its popularity, especially during summer, the trailhead parking lot can fill up quickly. It's advisable to arrive early in the morning to secure a spot.
The trail is generally rated as moderate to hard. The initial 1.2 miles are relatively flat through forests. However, the difficulty increases significantly with continuous climbing, switchbacks, and rugged terrain, especially between Alpine Lake and Sawtooth Lake. Hikers will also need to ford Iron Creek, which can be challenging during high water.
The hike typically takes around 2 hours and 45 minutes one way, or approximately 5.5 hours round trip, not including stops. The total distance is about 5.4 kilometers one way, with an elevation gain of 458 meters.
The best time to hike this trail is typically from July through September. Due to the high elevation, snow can persist into early summer and return as early as October, making access difficult or impossible outside of these months.
Yes, the trail enters the Sawtooth Wilderness, and a free wilderness permit is required. These are usually available at the trailhead. Remember to adhere to Leave No Trace principles, including packing out all waste.
The trail offers diverse and breathtaking scenery. You'll pass through lodgepole pine forests, open slopes with wildflowers, and gain expansive views of serrated granite ridges. The ultimate highlight is Sawtooth Lake itself, a large, glacier-carved alpine lake with deep blue waters, nestled below the imposing Mount Regan. Alpine Lake is also a notable feature along the way.
No, campfires are not permitted at Sawtooth Lake. This restriction is in place due to the high usage of the area and limited fuel sources, which helps protect the fragile alpine ecosystem.
While the initial section is relatively flat, the overall trail is rated moderate to hard with significant elevation gain and rugged terrain. It might be challenging for very young children or absolute beginners. Hikers should be prepared for a strenuous ascent.
Given the trail's difficulty and alpine environment, essential items include sturdy hiking boots, layers of clothing for changing weather, plenty of water, snacks, sun protection, a map and compass or GPS, and a first-aid kit. Don't forget your wilderness permit!
Yes, as part of the Sawtooth Wilderness, hikers must follow Leave No Trace principles. This includes packing out all trash (including human waste due to high use), staying on designated trails, and respecting wildlife. A free wilderness permit is also required.
While specific sightings are never guaranteed, the Sawtooth Wilderness is home to various wildlife. You might spot deer, elk, pikas, marmots, and a variety of bird species. Always observe wildlife from a distance and never feed them.