Really, it's only a three-star trail, but I gave it four due to its convenient parking and diversity of lush greens, sandy shores, bike and roller-blade paths, and even an off-leash area for dog lovers. Actually, while writing this review I just realized it is a four-star trail after all!
I've been here a couple of times, first for a bonfire! not really a hike lol, even though you haven't left san diego, it feels like you have..... 2nd time I went with some mates and we electric skateboarded around the loop a couple times! soo much fun. Now I just have to walk it!
This is the best spot in San Diego to hike and play with your dog. Horses, I agree, should probably stay to the East and North end of the West side, that is outside the fenced area most of the dogs run, but those make a long, very nice ride along the sand and many people trailer in their horses. Fiesta Island is cool enough on hot days for dogs to play and people to ride when it is really too hot further inland.
Took the horses here for a swim. Advice to equestrians: stay out of the off leash dog area. It's always full of dogs, most of whom aren't socialized to horses. Can create pack mentality, and some horses/riders have been attacked. There are many unusual sights, sounds and traffic here, so be prepared! It's fun to swim, and once acclimated, the horses do enjoy a trip here, especially in the heat of summer. Avoid Fri-Sun, as the Mission Bay is very busy.