www.active.com

Lake Merced ½ Marathon and 4.5 Mile Run

San Francisco, California, United States

calendar_today 27 Sep, 2026

directions_run Running

sell $10.00

About the Event

Join us for the best bargain half marathon in the Bay Area! Three loops around the paved Lake Merced bike path includes aid stations, post-race snacks, finisher ribbons to all participants, and place ribbons to the Top 5 Overall M/F/NB runners. The half marathon starts promptly at 8:00am at the main parking lot near Sunset Blvd.

We also feature a single lap race, just one 4.5 mile loop around the lake. The single loop also starts at 8:00am in the main parking lot. Finisher ribbons to all participants, and place ribbons to Top 5 overall M/F/NB runners.

Race check-in begins at 7:00am and the race starts at 8:00am.

Parking available at the main parking lot near Sunset Blvd. Additional parking available along Lake Merced Blvd.

Race is held rain or shine and we regret no refunds. For more information please visit our website www.dserunners.com, or email us at dseracesignup@gmail.com. For insurance/safety reasons, the following are not permitted - baby joggers, dogs, or use of headphones. Thank you for your cooperation.

Races Offered

Running-4.5 Miles - 4.5 Mile Run

Sep 27, 2026

straighten

Distance — 21.1K

terrain

Type — Running

timer

10:00

sell

$10.00

Running-Half marathon - Half Maraton

Sep 27, 2026

straighten

Distance — 21.1K

terrain

Type — Running

timer

10:00

sell

$10.00

Weather History

These values represent the 3-year monthly averages for September in San Francisco.

thermostat Temperature

14.3° / 20.7°

wb_sunny Feels like

12.7° / 18.4°

light_mode Avg sunshine hours

10h 44m

water_drop Avg rainfall

0.1 mm

ac_unit Avg snowfall

—

air Avg wind speed

14.2 km/h (Gentle breeze)

opacity Sweat loss rate

Moderate

terrain Course conditions

Firm and slightly soft

sunny Max UV Index

Moderate (5.0)

humidity_mid Humidity

80.5%

wb_twilight Sunrise

06:51

nightlight Sunset

19:16

About San Francisco

Learn more about the host city, San Francisco.

The centerpiece of the Bay Area, San Francisco is one of the most visited cities in the world, and with good reason. The cultural center of northern California, San Francisco is renowned for its mixture of scenic beauty and unique culture that makes it one of the most vibrant and desirable cities in the nation, if not the world.