Channel Islands National Park - Things To Do: San Miguel Island (U.S. National Park Service)

One-day trips, long overnight camping trips (minimum stay is generally 3 days—Friday to Sunday), and multiday boat trips.
Be prepared for adverse weather. Wind speed on the island averages about 20 mile per hour.
Hiking options are limited. Visitors may explore a small area on their own—including the 2-mile long Cuyler Harbor beach and the 1-mile trail to the ranger station. To see other parts of the island you must go with a ranger. Rangers are generally available to lead hikes, but check with the park or concessionaires in advance.
Ideal place for viewing native vegetation, the unique caliche forest, and seals and sea lions (with ranger escort).
Due to high incidence of strong winds, swimming, snorkeling, diving, and kayaking are limited and recommended for the experienced visitor.
Despite the wind, Cuyler Harbor is one of the most scenic beaches in the park.

You are exiting the National Park Service website