The perfect neighborhood park. Like others have said, there's a popular leash-free dog park in the northwest corner. I also love running around Berkeley Lake itself. It's not too busy most of the time and it's almost exactly one mile around. The only drawback is the stretch that runs along I-70 and the on ramp from Sheridan Blvd. There's also a rec center with indoor and outdoor pools, tennis courts, and a small public library branch all in the same location.