Lake Merced Half Marathon
Race Date
Sep 21, 2025
Location
San Francisco, CA
Quick facts
- Date
- Sunday, September 21, 2025
- Location
- San Francisco, California
- Distance
- Half marathon (13.1 mi) + 4.5M run
- Course
- Loop Course
- Terrain
- Road
- USATF certified
- Not listed
- Finishers on record
- 1,965
The Experience
Volunteer Opportunities
Race Day Volunteering To serve as a Race Director, see the Race Director Page (https://dserunners.com/volunteer/race-directors/) Volunteer Points How to earn points (https://docs.google.com/spreadsheets/d/e/2PACX-1vQUYaGqzqo7PE61ZBtxBr4wBHoixA-GV1qp-7WY4jdFrRbsd63QiKfX4NbubIKjHyBtWUi6WgU3Jrlg/pubhtml)
Logistics
Race Day
Sunday, September 21, 2025
Start Time
TBA
Start Location
San Francisco, CA, 94132
Course Info
Course Type
Loop Course
Terrain
road
Difficulty
Rolling Hills
Net Drop/km
0 m (Flat)
Separation
0.0%
Also Offers
Quality Score
Standout6217 years running
~54 finishers a year
shrinking
34% returning runners
3 timing sources
runners from 1 state
winner 1:20:45
typical high 67°F
Race Day Weather
5-year historical avgStart (Low)
58°
Afternoon (High)
69°
Pleasant conditions — light layers at start, comfortable by finish
0.0"
Precipitation
15 mph
Wind
81%
Humidity
Historical Finish Times
How 1,965 finishers actually crossed the line across 17 years.
Most recent
2026
Total finishers
1,965
Median time
1:50:58
Latest turnout
41
States
12
Turnout by year
2015–2026
Hover the histogram to inspect specific finish times.
About the Organizer
Frequently asked
When is the Lake Merced Half Marathon?
The Lake Merced Half Marathon is held on Sunday, September 21, 2025.
Where does the Lake Merced Half Marathon take place?
It takes place in San Francisco, California.
What distances does the Lake Merced Half Marathon offer?
The half marathon (13.1 miles), plus 4.5M run.
Is the Lake Merced Half Marathon course flat and good for a PR?
The Lake Merced Half Marathon is a rolling hills, loop course course.
How many people run the Lake Merced Half Marathon?
HalfRuns has finish records for 1,965 runners who have completed the Lake Merced Half Marathon.
HalfRuns editorial — independent, no paid placement.
Explore More Journeys
Can't make it to San Francisco? Discover other experiences that match your running style.
Search All Races
