This last week I spent wandering from friend to friend in the bay area. On my way from Antioch to Sunnyvale I had extra time before I had to meet a friend, so when I hit major traffic I decided to just stop at the nearest park. This is how I wandered into Contra Loma Park in the East Bay area. I had already been to the Black Diamond Mines, just an exit or so away the day before and expected more of the same rolling green hills with cows. So I was pleasantly surprised when I turned the corner of the cow pasture to find a huge lake.
All together it was a great experience and I highly recommend the park. I saw multiple other paths that went off into the hills which I did not follow- some of them great bike paths. The people I passed were all very friendly and greeted me.