You'll fall in love with San Francisco all over again as you follow this hilly loop trail circumnavigating Angel Island. Along the way, savor the panoramic vistas of the Golden Gate Bridge, San Francisco, Alcatraz Island, the East Bay, and Marin County. The 10K (slightly long at ~6.5 miles) is a single loop. The half marathon does the loop twice.
The course involves several singletrack trails. Keep an eye out for roots and low hanging branches.