28K
The Big Alta · Organized by Daybreak Racing
Distance
28 km / 17.4 mi
Elevation gain
3,900 ft
Cutoff time
5.5 hours
Difficulty
Going the distance
A 17.4 mile loop with 3, 900 feet of elevation gain. Mix of fire roads and single track through exposed ridgelines and oak woodlands.
Start at Marinwood Community Park. Climb Water Tank Fire Rd to Spring Hill ridge, continue through Patricia and Del Ganado fire roads to Terra Linda. Follow Luiz Ranch Fire Rd to 680 Trail, ascending Loma Alta's eastern flank. Summit Loma Alta at mile 6.7, then descend to Big Rock Aid Station at mile 8.8.
From Big Rock, climb 1,500 feet over 3 miles to Big Rock Ridge. Follow the ridge on fire roads for 2 miles to Queenstone Fire Rd. Descend Queenstone back to Marinwood Park for the finish.