Coyote Hills Regional Park, Regional park in Fremont, United States

Coyote Hills Regional Park covers nearly 978 acres on the southeast shore of San Francisco Bay in Fremont. The park takes in a small range of hills at the bay's edge and a substantial area of wetlands. Most trails are wide fireroads looping around the hills and marshes, with one fireroad running north–south through the hill ridge.

The East Bay's first inhabitants here were Ohlone hunters and gatherers whose staple diet included acorns, and 2,000-year-old Tuibun Ohlone shellmounds survive in the park. A Nike missile base was later built on the hills; after it was decommissioned the Stanford Research Institute used the marshes for advanced sonar research, keeping marine mammals including dolphins. SRI finished in the mid-1960s and the site was dedicated for public use in 1967, with the East Bay Regional Park District as manager.

The park protects shellmound sites of the Tuibun Ohlone, about 2,000 years old, where acorns were a staple food. Ohlone descendants still live in Fremont, Newark and Union City. At the main shellmound, programs by reservation show a reconstructed tule house, shade shelter, pit house and sweat lodge.

The main entrance is located at Patterson Ranch Road, with parking available and restroom facilities at trailheads. Spring and fall offer the most comfortable conditions for walking, with moderate temperatures and good footing on the paths.

The salt marshes here are a crucial stopover for migratory birds traveling between North and South America. Depending on the season, visitors might see hundreds of birds gathering to feed and rest before continuing their long journeys.