The beach communities of Southern CA have one thing in common besides great weather. There seems to always be an abundance of bicycle traffic along the beach. Rentals are easy and plentiful. Once such place I found in down town Pacific Beach just a block from the ocean is Bicyle Discovery located at 742 Felspar Street, San Diego, CA 92109.
Their bicycle rental rates are:
$15.00/ 4 hours
$25.00/ All Day
Tandem bikes area available for rent as well for a slightly higher fee.
You can bring your own bicycle or rent one in San Diego and you can ride a bicycle in some areas of the city like Balboa Park, Gaslamp District, Coronado Island.
Check the page:
....you gotta enjoy the biking you can do here!
rent a bike and take the ferry across from San Diego to Coronado. From Coronado you can ride a bike path called the 'Silver Strand'. It goes south towards the border with Mexico and follows the highway.
Follow this policeman and ride a bicycle - at least at Gaslamp Quarter. Hmm... it's not a big area = easy to walk around.