The missile facility near San Ramon was designed for the Ajax
missiles — becoming obsolete when the long-range Hercules missiles
were established at SF-31, just outside of the Lake Chabot/Castro
Valley area in June 1959.
As you approach the trailhead parking area you will pass the
remains of SF-25L, some Nike-era buildings being used as the Las
Trampas park office. The cache is located at "SF-25C Rocky Ridge",
elevation 1978 feet. The IFC site is now covered with microwave
relay towers.
Both stages of this cache are located within EBMUD property and
as such you will be required to obtain a trail
permit from them.
Fgntr 1: frr gvgyr.