running

the course

49th SF Marathon

Embarcadero to Fisherman's Wharf, up and over the Golden Gate Bridge into Marin, back through the Presidio, across the Richmond into Golden Gate Park, down through Haight-Ashbury and the Mission, finishing on the Embarcadero. Known for its hills. The three big climbs hit in the first half: mile 6 up to the bridge, mile 10 through the Presidio, mile 12 up 27th Ave. The back half rolls but trends down. First and last two miles are flat. Fog and 55-65°F at the start. 14 aid stations. Gels at stops 6 and 10.

1,303

ft elevation

306

ft peak elev

~60°F

avg temp

4:32

median finish

milestones

logic

auto-checked against your strava data. only counts runs from the last 6 months.

predicted finish

based on current fitness

need PR data to predict

personal records

cardiac efficiency

● <5mi ● 5-10mi ● 10mi+ (what matters)

logic

how fast you run per heartbeat. higher = fitter. as your aerobic base builds, this line goes up you're covering more ground for less cardiac cost. filters: runs 3mi+ only, must have heart rate data, excludes activities named "walk" or slower than 25:00/mi pace.

cardiac drift

logic

how much your HR rises from the first half to the second half of a run. compares avg HR of first-half laps vs second-half laps from your Garmin. under 5% on long runs = marathon ready. over 10% = went out too hard or aerobic base needs work. filters: runs 3mi+ with 4+ Garmin laps that have HR data, excludes walks.