Best mountain peaks in Custer Gallatin National Forest span over three million acres across Montana and parts of South Dakota. This vast area encompasses diverse landscapes, including rugged alpine terrain and remnants of glacial activity. The forest features prominent ranges like the Gallatin, Madison, Absaroka, and Beartooth, offering a wide array of outdoor experiences. It is a significant landmark for outdoor enthusiasts seeking varied mountain environments.
Last updated: June 24, 2026
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Gravel biking in Custer Gallatin National Forest
Great nontechnical hike to the summit of one of Bozeman's iconic southern peaks. A few stream crossings for filtration if you want to go light. Some steeper grades just up from the lake, but mostly very manageable grades, gorgeous views! Mountain goats were seen as well. Highly recommended.
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Lionhead is a 2,904-metre (9,528 ft) summit on the Continental Divide Trail. The trail that leads up and down from it is popular with mountain bikers so respect all users when hiking. It can be accessed from the Targhee Pass Highway. The peak is named because, from certain angles, it looks like the head of a lion.
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The final stretch to the summit can be a slog and may end up being more of a hike than a bike, however, the views more than make up for the effort. Also, the fire lookout at the summit is available for overnights so check recreation.gov if you plan to do some bikepacking.
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At 8,914 feet, Baldy Mountain is considered the first notable high point on Bridger Ridge when starting from the south (aka, from the Bozeman side). You have views of multiple mountain ranges from up on the ridge (including the Crazies, Absoroka-Beartooth, and Gallatin Range), and you can tackle this peak from multiple trailheads. This rocky summit is one of the most popular on the ridge.
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The spur that leads to the summit of Mt. Blackmore will steal your breath in more than one way. Be ready to earn the summit that stands at just over 10,000 feet. As always, stay aware of changes in weather when climbing exposed peaks, but also keep an eye out for a stunning range of wildflowers while you climb.
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Lionhead is a 2,904-metre (9,528 ft) summit on the Continental Divide Trail. The trail that leads up and down from it is popular with mountain bikers so respect all users when hiking. It can be accessed from the Targhee Pass Highway. The peak is named because, from certain angles, it looks like the head of lion.
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Garnet Mountain is adorned by a fire lookout tower and offers splendid views of the surrounding countryside and distant mountain peaks. It's an interesting vantage point for Storm Castle, seen from a new perspective. Garnet Mountain is best hiked from June through October, as it can still hold snow in late spring.
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Also known as Castle Rock, Storm Castle is a conspicous sight that towers above Gallatin Canyon. Unsurprinsgly given its obvious prominence, its top gives a superb panorama of the surrounding landscape. A winding, uphill trail gives access to its tiered summit. Be aware that the area is notorious for ticks in spring. Check yourself, your hiking buddies and your pets thoroughly after your hike.
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Among the highly regarded peaks, Mount Blackmore offers amazing views of the Gallatin Range and can be reached via the Blackmore Trail. Another favorite is Storm Castle, also known as Castle Rock, which provides a superb panorama of the surrounding landscape from its prominent position above Gallatin Canyon.
Yes, for those seeking a challenge, Baldy Mountain Summit is a popular rocky peak at over 8,900 feet, offering views of multiple mountain ranges. Another demanding climb is Saddle Peak, known for its distinctive two high points and a very trying northern ridge climb.
Crazy Peak stands as the highest and most prominent mountain within the Custer Gallatin National Forest, reaching an elevation of 11,211 feet (3,417 meters). However, the highest point in Montana, Granite Peak, at 12,799 feet (3,901 meters), is also located within the Beartooth Mountains, which are part of the Custer Gallatin National Forest.
The region offers diverse natural beauty. For instance, the trail to Hyalite Peak is a dream for waterfall enthusiasts, passing more than 10 waterfalls, including the easily reachable Grotto Falls, before leading to Hyalite Lake. You can also find sprawling alpine landscapes, diverse wildlife, and remnants of glacial activity across the forest.
Yes, Garnet Mountain is adorned by a fire lookout tower, offering splendid views and an interesting vantage point. This lookout is even available for overnights, making it a unique destination for those interested in bikepacking.
Many peaks are best hiked from June through October. For example, Garnet Mountain is recommended during this period as it can still hold snow in late spring. Always be aware of changes in weather when climbing exposed peaks, especially at higher elevations.
Beyond hiking, the area offers a variety of outdoor activities. You can explore numerous mountain biking trails, such as the challenging Bangtail Divide Trail or the Blackmore Trail. For cycling, consider routes like the Beartooth Highway or the Hyalite Reservoir loop. Gravel biking options are also available, including loops from Clyde Park or Bozeman.
Sacagawea Peak is a highly popular destination for hikers, offering a rewarding 4.2-mile (6.6 km) out-and-back trail. This hike leads to stunning views of the Bridger mountain range and the surrounding valley, making it a favorite among Bozeman locals due to its accessibility and incredible vistas.
Visitors frequently praise the stunning panoramic views from the summits, the diverse landscapes, and the sense of accomplishment from reaching challenging peaks. Many appreciate the opportunity to see abundant wildlife and experience the rugged alpine terrain. The variety of trails, from moderate to strenuous, also caters to different skill levels.
Mount Blackmore provides amazing views of the Gallatin Range. Additionally, Baldy Mountain Summit offers views of the Gallatin Range, among other mountain ranges, from its high vantage point.
Storm Castle, also known as Castle Rock, offers a moderately difficult but relatively quick trail to its summit. However, be aware that the area is notorious for ticks in spring, so it's advisable to check yourself, your hiking companions, and your pets thoroughly after your hike.
Gallatin Peak, a prominent summit in the Madison Range, is the highest in the Spanish Peaks subrange, reaching 11,016 feet (3,358 meters). Its rugged terrain, including steep couloirs and more accessible routes, attracts hikers, backpackers, climbers, and backcountry skiers. It offers notable views visible from the Gallatin Valley and Bozeman.


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