Arastradero Preserve, officially known as Enid W. Pearson–Arastradero Preserve, is a 622 acres nature preserve that protects most of the Arastradero Creek watershed, including its ephemeral Mayfly Creek tributary. It also includes the upper reach of the Felt Creek tributary to Stanford's Felt Reservoir. The preserve is owned and operated by the City of Palo Alto, California. The main parking lot hosts an interpretive center and is located at 1530 Arastradero Road (37°23'13" N, 122°10'29" W).

Arastradero Preserve consists of rolling savanna grassland hills and evergreen forests; the preserve varies in elevation from 275 ft in the northeast to 775 ft in the southwest. There are four gates (labeled A, B, C, and D) into the preserve, though public parking is available only at Gate A on the North side. Gate D connects to Foothills Park as part of the Bay-to-Ridge Trail. The park is also accessible from a pedestrian footpath that leads to the residential area on the street Paseo del Roble.

The east portion of the preserve protects Arastradero Creek, which flows into Matadero Creek at the junction of Arastradero Road and Page Mill Road. Near the East side about a quarter mile south of the entrance is Arastradero Lake, and further south up into the preserve is Sobey Pond. The lake is

The preserve contains an abundance of wildlife, including deer, bobcats, coyotes, snakes, and many species of birds. The preserve and the surrounding area are habitats for the California puma (Puma concolor is also locally known as mountain lion). There are regular sightings of puma and coyotes in the areas, and people hiking with dogs or small children should be cautious.

Trails The Pearson–Arastradero Preserve has 10.25 mi of trails for hiking, biking and horseback riding. While many of the trails are open year-round, some trails are designated as "seasonal" and are closed at the trailhead temporarily after heavy rain. The trails at Arastradero Preserve include Acorn, Arastradeo Creek, Bay Laurel, Bowl Loop, Juan Bautista de Anza, Meadowlark, Ohlone, Paseo del Roble, Portola Pastures, R