This park is at the very end of Quinlan Park Rd. From 620 turn onto Quinlan Park Rd, regardless of which way you are going on 620 you can only turn one way onto QP Rd(it dead ends into 620) turn that way drive all the way to the end. It dead ends at Lake Austin and the park. The park is about 5 acres and has picnic tables, grills and restrooms and the only boat ramp within several miles. There are no fees and fishing is allowed but not sure about swimming. I would not suggest swimming since the river is very narrow at this point . I have only actually used the park for the boat ramp. The park would get 4 stars the boat ramp a 2. The parking lot can only accommodate 10– 15 trucks with trailers attached. Today there was a party going on and the parking situation was insane — a lot of people blocked in and cars parked all along the boat ramp making the boat ramp almost impossible to navigate. The person in front of us side swiped a Jeep with his boat trailer. Even though the Jeep was not moving I think it was the Jeeps fault — what idiot parks there car on a boat ramp? It is hard enough to back a trailer down a ramp without having to navigating cars on all sides. If Mary Quinlan was not less than 5 minutes away we would drive the extra 20 minutes for the park at the 360 Boat Ramp.