I recently arranged the trolley ride for "out of town" guest, mainly because 2 of our 4 guests have difficulty walking very far. We enjoyed the tour very much, and our driver/guide was excellent and was very knowledgeable about the city. I felt the highlight of the tour would be Balboa Park, so I reserved lunch at The Prado. Was I surprised when our driver told us that the closest he could get us to the actual park and the restaurant was 2 very long uphill blocks away! We did find a small trolley for the park some distance from our stop, but it was very full every time it came by. My advice is to not plan on lunch when you take the trolley.