From the intersection of the 55 and 91 freeways proceed east 2 miles to the Imperial Highway exit, then go north 2 miles on Imperial to the Kellog exit. Follow Kellog north to the dead end at Yorba Linda Blvd, then right ½ mile to Fairmont. Left on Fairmont then left on Rim Crest, which is just past the top of the hill.
The trailhead is a dirt road on the right at the point where
Rim Crest street turns left. Parking on Rim Crest after 7 pm is not allowed.