Inspiration Lake is basically a public park open to anyone during daytime hours. You can rent pedal boats and enjoy the day out in on the water, or take a walk around the entire park and enjoy the gardens. I think bike rentals may be available but cant remember. Not much is there to do as far as I could tell from my 2 visits to the lake, so it is more of a relaxing place to visit and enjoy the ambiance. There is a 7-11 convenience store right at the park's entrance if you get the cravings for a drink or snack, etc.