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San Francisco Marathon San Francisco, California, United States

Name: San Francisco Marathon
Start: 2025-07-27
End: 2025-07-27

This has already taken place.Click here to go to the 2026-07-26 event.

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San Francisco Marathon

Course maps

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Route source

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10K
First Half
Second Half
Marathon

Foot race | 27 Jul 2025

26.5 mi

Distance

Elevation gain

315 ft

Elevation high

85 ft

Elevation avg

Road/Asphalt

Elevation loss

3 ft

Elevation low

Climb factor

What is climb factor?

The climb factor for a course is the percentage of your energy used in hill-climbing compared to the energy expended running the flats.

This course has a climb factor of 4% over 26.5 mi, which means that the energy expenditure for the run is equivalent to running a flat 27.4 mi.

Climb factor is provided courtesy of Ben Crowell, who both authored climb factor's scientific paper and wrote the open source software for it. You can read more about it here .

Course last updated 3 May 2024

All values approximate

Distance & elevation data

The distance or elevation data not precisely what you expect for this route?

Data from a GPS device can be rough, especially in areas where the terrain (trees, canyons) interfere with GPS signals. And routes drawn on our maps are reliant on people marking trails from satellite images -- the details of which can be hidden by trees.

Elevation can be tricky too. Elevation data is stored on spaced topographical lines, and determining the elevation of a point requires computers to estimate based on how close the point is to the topographical line.

We mitigate this by calculating distance in 3-D (think Pythagorean theorem) and using mathematical techiniques to smooth the elevation data. We come close, but no one can be perfect with imperfect data, even in 2026.

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San Francisco Marathon - Marathon course map

Stats summary

Race distance	Distance	Ele gain	Ele loss	Ele avg	Paved	Gravel	Dirt	Narrow
10K	6.4 mi	36 ft	33 ft	10 ft	99%	1%	0%	1%
First Half	13.1 mi	971 ft	738 ft	85 ft	97%	2%	1%	42%
Second Half	13.3 mi	801 ft	827 ft	135 ft	97%	3%	0%	43%
Marathon	26.5 mi	1,424 ft	1,424 ft	85 ft	98%	2%	1%	31%