[a] The park preserves one of the few habitats of the Alameda manzanita, which is deemed extremely rare, according to EBRPD.

[2] The land on which SRRP lies was once part of the Rancho El Sobrante grant that the government of Mexico gave to Juan Jose Castro.

Cutter raised horses and cattle on the property, using blood from the animals to produce vaccines for diphtheria and tetanus.

Part of the Sobrante Ridge property was dedicated to EBRPD by a local construction company in 1980.

Flora includes oak/bay woodland, coyote brush scrub, Alameda manzanita and open grassland.