I guess even seagulls have to rest once and a while. This is a California Gull or Larus californicus. These birds are quite common here in Utah Valley, however, this one was sitting on the rocks near La Jolla, California. Quoting from the Cornell Lab of Ornithology, All About Birds:
Gulls are often thought of as coastal birds, but California Gulls are also common in inland areas in the West. These medium-sized gulls breed in colonies on islands and levees in lakes and rivers. You'll also spot them in pastures, scrublands, and garbage dumps as they often forage miles from the colony, eating everything they can find from mayflies to garbage. In the winter they head to the coast where they cruise up and down the shoreline with other gulls.This particular bird is a breeding adult. I like to watch seagulls fly and I am still surprised to see them here in Utah.