There is a trail that was too muddy from recent rains to run on, and there is a paved path/road that all visitors were on. So, it isn't off-road hiking. However, my husband and I went specifically for a run and did not want a lot of elevation changes for this one. This is a great, solid 5 mile run. It was pretty populated on a cool, sunny day, but not so much that we felt crowded in our run. Great for cyclists, especially kiddos. There are port-a-johns at a few points along the loop. It is a beautiful area with a great breeze flowing, shady and sunny spots, depending on what you like. :) Parking lots are not that big, so parking might be difficult. We were able to park in the larger lot without problem.
Nice and Easy hike, great for kids. Bring your bike, skates, or running shoes. Paved road around the lake, but also a nice hiking trail parallel to it. It is a loop trail, however to our disdain the gate on the other side was locked and there were no signs to indicate this little important fact. We had to go back half way around the lake without completing the loop. Real bummer. Parking was a challenge as we had to park on the road, because the vehicle entrances to the park was closed. We are still wondering who was the "genius" that on such a busy day as ThanksGiving Day, decided to lock the gates on the trail and the main entrance.
I run here frequently because it's so much better than a treadmill. People who come here are commonly friendly and of all age ranges. Some are training for competition and others are just out for a stroll. Great view of the sunset and beautiful view over Mira Mesa, just be conscious of when the gates close so your car doesn't get locked in overnight. There are portable restrooms throughout the lake loop, but no water fountains. Overall, great place!