# Joseph D. Grant County Park > Place to go for families in the San Jose–Sunnyvale–Santa Clara area (CA). Times are Pacific Time. - When: Open year-round, 8 a.m. until sunset. - Where: Joseph D. Grant County Park, 18405 Mt. Hamilton Road, San José, CA 95140 - Ages: All ages - Price: $6 daily vehicle entrance fee (county parks rate; fees posted at the entrance kiosk); no fee for vehicles with a DMV disabled placard or plate - Schedule: Open year-round, 8 a.m. until sunset. - Organizer: Santa Clara County Parks and Recreation Department - Official page: https://parks.santaclaracounty.gov/ - Last checked: Sat, Oct 24 Source: Grassy Knees is a directory of real family events, places and programs for kids across major U.S. metro areas, where every listing is researched from the organizer’s own page and shows the date we last checked it. https://grassyknees.com covers 42 metro areas as of Oct 24, 2026, with more added regularly. About: https://grassyknees.com/about Freshness: listings are re-checked on a daily research run (latest check 2026-10-24), and new events are added as organizers post them. Sell-outs, weather cancellations and time changes show up on the live page first: https://grassyknees.com/san-jose/activities/joseph-d-grant-county-park--listing-08c8cb713462c4e4e1d9a09a ## About Joseph D. Grant is Santa Clara County's largest regional park: 10,882 acres of grassy hills and big oaks in Halls Valley at the base of Mt. Hamilton, on the road up to Lick Observatory. A 51-mile trail system is open to hikers and horses, with mountain bikes allowed on over 75% of it, and dogs on a 6-foot leash are welcome on trails, picnic areas and campgrounds. Families can fish for warm-water species in the lake and ponds, picnic in shaded first-come areas, or camp at about 40 reservable family sites with hot showers. Kids with a phone or tablet can play Agents of Discovery, a free educational mission game that starts near the historic ranch house and loops more than 1.5 miles on the Hotel and Snell trails (download it on the guest Wi-Fi by the ranch house). Spring wildflowers are the park's best season; cattle still graze parts of the land. ## Similar picks in San Jose - [A Mystery of Skulls Nature Pop-up at Metcalf Motorcycle County Park](https://grassyknees.com/san-jose/activities/a-mystery-of-skulls-nature-pop-up-at-metcalf-motorcycle-county-park--listing-14498187b654885ea9c20727) — Sun, Oct 25 · 10:00 AM – 1:00 PM · Metcalf Motorcycle County Park · All ages · Free · checked Oct 24. 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History San José's Children's Halloween Haunt turns History Park, the 14-acre collection of historic homes and shops in Kelley Park, into a costume-friendly Halloween afternoon… - [Trunk or Treat at Educational Park Library](https://grassyknees.com/san-jose/activities/trunk-or-treat-at-educational-park-library--listing-8cec6fb12cf054e0f8d80ba6) — Sat, Oct 24 · 4:00 PM – 6:00 PM · Educational Park Branch Library · All ages · Free · checked Oct 24. Educational Park Library turns its parking lot into a Trunk or Treat for the neighborhood, with decorated cars handing out candy (while it lasts), music and outdoor games… ## More for families - [This weekend in San Jose](https://grassyknees.com/san-jose/this-weekend) (Markdown: https://grassyknees.com/san-jose/this-weekend.md) - [Things to do with kids in San Jose](https://grassyknees.com/san-jose) (Markdown: https://grassyknees.com/san-jose.md)