Most people reach San Diego from the north, typically using the train that takes two hours from Los Angeles to the southernmost city of California.
I myself made this choice and I could admire the succession of towns overlooking the sea and the beaches with surfers soak waiting for the right wave.
Compared to other Californian cities San Diego is more crowded, undefined: it is not hip and trendy like San Francisco or glamor and wild like Los Angeles, yet it is one of the cities that has remained in my heart for the peaceful but not boring soul that characterizes it, despite being the second largest city in California.
In particular, you will be struck by the many sporting activities you can enjoy in the city: from yoga in one of the many centers overlooking the ocean to running, without forgetting the fabulous beaches that await you.
Mission Beach and La Jolla, in particular, are the favorite destinations for sea sportsmen: surfers, body boarders, kayakers or simple swimmers.
A particular experience for everyone is kayaking the stretch that leads to a nature reserve with caves inhabited by sea lions … to paddle with these animals a few inches playing with the canoe is priceless.
If you are not a lover of water sports, do not worry: even on the mainland you will not get bored: runners, runners, cyclists and rollerbladers intertwine along the road that runs along the beach.
Very popular with cyclists is the route from Mission Beach to La Jolla that requires a bit of training, but if you are going to try this route, the starting point is the San Diego Bycicle Education and Advocacy Group.
For rental equipment, I recommend the Cheap Rentals at 3585 Mission Boulevard.
Have fun!