Bonny Doon starts out hard from Pacific Coast Highway 1. It gains about 1000ft in 2.0 miles (9.5% average grade). It then gains another 600ft over the next 3.6 miles before the short descent and merges with poorly-named Pine Flat Rd. A relatively flat area with many ponderosa pine trees is east of this road. While not as steep as its lead in, Pine Flat continues on seemingly endlessly at a reduced 4% grade.\nApproximately 1.5 miles up Pine Flat Road is its intersection with Ice Cream Grade, which first provides relief from the climbing via a 200 foot narrow, shaded descent, but then demands full payment plus interest with a 380 foot climb to Empire Grade, which it intersects across from Felton Empire Road.