Brazen Racing Diablo Trails Challenge 50k
ElevationAscent: 6,147' 1,873 m
Descent: -6,148' -1,874 m
High: 3,806' 1,160 m
Low: 368' 112 m
GradeAvg Grade: 7% (4°)
Max Grade: 35% (19°)
Current trail conditions
Popular runs nearby
Stage Road Loop
4.1 mi 6.6 km • Loop • 590 ft Ascent 179.73 m Ascent
Singletrack Diablo, CA
Juniper to Summit Loop
6.6 mi 10.6 km • Loop • 1,737 ft Ascent 529.47 m Ascent
Singletrack Diablo, CA
Miwok Trail / Hardy Canyon Trail Loop
4.8 mi 7.7 km • Loop • 955 ft Ascent 290.95 m Ascent
Singletrack Byron, CA
Tilden Park Loop
4.4 mi 7.1 km • Loop • 864 ft Ascent 263.36 m Ascent
Singletrack Kensington, CA
2.0 mi 3.2 km • Loop • 109 ft Ascent 33.32 m Ascent
Singletrack Piedmont, CA
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“A challenging but beautiful tour of East Bay Hills, conquering both the Summit and North Peak of Mt. Diablo.”— Lia Maria
Featured Race - Apr 13, 2019
This 50k loop course winds its way through the East Bay Hills, arcing over and around hilltops and through tree-sheltered canyons before climbing to Mt. Diablo's summit. From there, expect a short descent before another climb/scramble to the top of the North Peak, after which the runners make their way back through the hills to the race start/finish area at Castle Rock Park.
Around mile 13, there is a short out-and-back along a dirt road before heading out on the trail again. Midway through the course is a climb to Mt. Diablo's summit, which becomes a bit of a steeper run near the end. From the summit of Mt. Diablo, you can see for 200 miles in good conditions. San Francisco and the Sierras can be visible, as well as a wide swath of additional landscape.
After reaching the summit around mile 19 or 20, the trail descends back down, around, and up to the North Peak. The last part of the trail to the North Peak is steeper and a little tricky - exercise caution. It can even be a bit of a scramble up (though there is a path).
After coming down from the North Peak, the trail winds its way around the other side of the mountain. From here, the trail covers more canyons, ups and downs through the hills before cresting a ridge again. It takes a course over open hills until it descends back to a more wooded area near the finish. Here, there are a number of stream crossings before reaching the start/finish area at Castle Rock Park again.
(Note: percentage of singletrack is a rough estimate)
Land Manager: East Bay Regional Park District (CA)