First let me Start by saying you must come here when it's Pouring rain. The more rain, the more amazed you will be.
The Park itself is for a leisure mile loop, with a bunch of stairs to climb. They also have a small Dog playing area. You can see great Views of the Harbor on a nice day. My motivation was to get there when it rained and here is why, you must see the pictures to believe your eyes.
On the side of the Park on the street view end, the Rain creates a majestic Waterfall the pours down the Canyon. the more rain, the bigger the Falls.
Hope you have the chance to see it for yourself.
Very pleasant hike along sandy trails through coastal brush. We did this hike as part of the longer Dana Point Headlands Trail. Beautiful views when we did the hike in the morning. We do it again another day closer to sunset. Should be outstanding.