Approach Distance: 4.5 miles
Approach Gain: 3,000 feet
Skiable Vertical: 700 feet
Duration: 4 to 6 hours
Distance from Bozeman: 30 minutes
Avalanche Hazard*: Moderate to high
Towering above the Gallatin Valley and visible from most points within town, Mt. Blackmore has exploded in popularity for its relatively easy access to spectacular alpine terrain. Nonetheless, this renowned classic should top any local backcountry skier's hit list. Get up early to beat the crowds after a recent snow, and you'll be rewarded with sweeping powder turns near the rim of the Gallatin Crest.
Head up Hyalite Canyon Road and turn right into the Hyalite Reservoir parking lot—ya can't miss it.
From the parking lot, head up Blackmore Trail for four miles, passing Blackmore Lake along the way. Depending on fitness level and mental state, you may enjoy a magical meander through the timber or suffer an interminable slog to the basin beneath the mountain's East Face. For the most common approach (A), skin up through the trees on the climber's far-right to gain the North Ridge. Amble up the ridge to your desired drop-in point. If you're heading to the summit, this approach is not recommended due to extreme consequence for a fall or slide on the upper North Ridge. Instead, from below the East Face, skin up to the saddle between Elephant Mountain and Mt. Blackmore (B), and ascend Blackmore's South Ridge. Gaia GPS route here.
The most popular descent (C) takes you down through sparse trees on the northern end of the East Face. The breadth of terrain and easy ascent here allow for multiple laps. Although relatively safe, this slope has the potential for a large avalanche. The central East Face (D) holds remarkable extreme-skiing terrain—getting caught in a slide here would unavoidably carry a skier through large rocks and cliffs. The Southeast Face (E) takes a long, moderate descent from the summit. A slide here is less likely, but not out of the question, and the terrain is extremely consequential, with the slide path spilling into the cliffs of the East Face.
Mt. Blackmore and its surrounding slopes contain a wide variety of terrain, much of which can produce large, consequential avalanches. Our description here indicates zones that carry a higher avalanche risk—do your research before heading out, and know which slopes are of greater concern. Once on location, follow all accepted avy-safety precautions, including digging pits and avoiding questionable areas. Have a backup plan in case you encounter unexpected conditions. On the ascent, choose routes that minimize exposure to avalanche terrain, and ski one-at-a-time down when descending through such terrain, keeping eyes on your partner.