Trailhead and Parking Area
From Sacramento, take Interstate 80 east and exit at North Canyon Way (exit 135) at Colfax. Turn left on North Canyon Way, which parallels the freeway, and after a short distance you'll see the parking area sign on the left side saying Stevens Trail.
On the opposite side of the parking area from the restroom, you'll see a sign marking the trail. It says 4.5 miles (9 miles round trip), but our trip to the North Fork American River and back was 7.5 miles total. Maybe it depends how far you walk along the river once you get to Secret Ravine.