Pearson-Arastradero Preserve is one of Palo Alto's accessible foothill open spaces, with trails through grassland, oak woodland, and low ridges. It offers a quick transition from Silicon Valley streets to a more open California landscape.
The preserve is good for hiking, trail running, mountain biking on designated routes, and birding. Go early on hot days, stay on marked trails, and expect a natural area rather than a manicured park.