Tucked away in the Godlen Eagle gated community, Augustin Bernal Park is truly an eastbay hidden gem. It's a 237 acre part on the east side of the Pleasanton Ridge. Its boundaries include the EBRPD Pleasanton Ridge regional park. It seems the park was gifted to the city around 1971 but its history (and name) date back to the Spanish settler who originally owned the land.
This is one of the few shaded hikes I found in the east bay hills that offers really good views and some perfect hiking loops. There's also mountain bike trails with some being only for bikers and equestrian trails as well. The only issue that makes this a less-than-perfect park is the access. This year, they started requiring non-residents of Pleasanton to have a pass which is now on a fee basis; if you're a resdient of Pleasanton then it's no big deal to get in. I know there is a another access point via walking on Longview drive and that used to be no permit required but I have not tried it recently. Technically, one could also hike here from the Pleasanton Ridge regional park via the ridgeline trail too. At the time of this review, it seemed to be 10 dollars for a week pass via https://www.cityofpleasantonca.gov/your-community/parks-trails/ . read more