WELCOME. Race Headquarters is in the parking lot at the north end of scenic Lake Merced lake at the foot of Sunset Boulevard in San Francisco, California. This is where you will park, check in, get your number, and receive aid.

It's a mostly flat, certified, 4.48-mile loop on either an asphalt path or groomed dirt shoulder around the lake. It's possible to run on the groomed shoulder path about 90% of the loop. There is approximately 100' of elevation gain and loss per loop.

With two exceptions, you will stay on the paved path that circles the lake. There are two spots approximately 0.75 miles after the start of the first lap where you will go straight and not follow the longer paved route. We will try to mark this on race day and will announce it prior to the start.

Runners will enjoy one aid station per loop fully stocked with water, electrolytes, and a wide selection of foods. You will also have access to your vehicle and are allowed to set up supplies near the aid station. A second water fountain is located about half way through the loop.

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