Lake Merced ½ Marathon and 4.5 Mile Run
Race Date
Sep 27, 2026
Location
San Francisco, CA
Quick facts
- Date
- Sunday, September 27, 2026
- Location
- San Francisco, California
- Distance
- Half marathon (13.1 mi)
- 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 27, 2026
Start Time
3:00 PM
Start Location
San Francisco, CA, 94132
Course Info
Course Type
Loop Course
Terrain
road
Difficulty
Rolling Hills
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)
57°
Afternoon (High)
66°
Pleasant conditions — light layers at start, comfortable by finish
0.0"
Precipitation
17 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.
Race Photos
About the Organizer
Frequently asked
When is the Lake Merced ½ Marathon and 4.5 Mile Run?
The Lake Merced ½ Marathon and 4.5 Mile Run was held on Sunday, September 27, 2026, starting at 3:00 PM.
Where does the Lake Merced ½ Marathon and 4.5 Mile Run take place?
It takes place in San Francisco, California.
What distances does the Lake Merced ½ Marathon and 4.5 Mile Run offer?
The half marathon (13.1 miles).
Is the Lake Merced ½ Marathon and 4.5 Mile Run course flat and good for a PR?
The Lake Merced ½ Marathon and 4.5 Mile Run is a rolling hills, loop course course.
How many people run the Lake Merced ½ Marathon and 4.5 Mile Run?
HalfRuns has finish records for 1,965 runners who have completed the Lake Merced ½ Marathon and 4.5 Mile Run.
HalfRuns editorial — independent, no paid placement.
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