Solstice Canyon also known as Roberts Ranch, was the site of a former space research facility (1961-1973). The Roberts family owned the site that featured a home designed by renowned architect Paul Williams. The home burned in 1982 and the canyon has burned, on average, every 11-14 years since the 1940s. Cyclists are limited to Solstice Canyon Road, and equestrians are allowed on all trails, except sections of the TRW and Rising Sun Trails. There are beautiful spring wildflowers, but be alert for ticks, bees, rattlesnakes, and poison oak.

From PCH, take Corral Canyon Road. After 0.2 miles, turn left into the park entrance. The first parking lot is on the right, immediately after the park entrance. To get to the second parking lot, drive another 0.3 miles down to the end of Solstice Canyon Road.