Fishing is very good for largemouth bass and panfish. Fish along the tules and around the islands. Use floating or Stillwater sinking lines with streamers and dragonfly nymphs on a twitchy retrieve. Try poppers early and late in the day. This is a small lake that is fun to fish when the bass are on their spawn.
Spring Lake is only a one to one and a half hour drive from the Bay area.
Float tube needed to access good water. Park requires use of a lifejacket. Fishing is fair. Some caddis and mayflies hatching in the late afternoon and evening, but not much dry fly action yet. Attractor dries might be worth a shot in the shaded areas.