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SF MARATHON 1ST HALF 2026

Alexander Ko

SF, CA

Bib: 17649 M 24

0:00
0:00
/ mi
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Overall
#0 / 6575
Top 48%
Gender (Male)
#0 / 3619
M20-29
#0 / 358
Race Day Weather
59°/49°F
scattered clouds

Race Timeline

Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
10 ft elev
2M
9:54/mi
19:48
→ flat
12 ft elev
4M
10:02/mi
39:52
↑ 67↓ 69
10 ft elev
6M
10:40/mi
1:01:13
↑ 1231.1%
126 ft elev
8M
10:17/mi
1:21:47
↑ 166↓ 531.1%
246 ft elev
9.6M
10:17/mi
1:38:15
↑ 68↓ 1931.5%
126 ft elev
10M
18:34/mi
1:45:40
↓ 241.1%
90 ft elev
10.5M
4:44/mi
1:48:02
↓ 732.7%
18 ft elev
12M
15:13/mi
2:10:51
↑ 2803.2%
272 ft elev
Finish· 13.11 mi
10:18/mi
2:22:17
↑ 14↓ 891.3%
205 ft elev
Course Elevation
10–277 ft
≈
×22story building
•▲ 774 ft climb · ▼ 557 ft descent

The Course

Half Splits

1st Half· via 6M
1:01:1310:12 /mi⚡ faster
2nd Half
1:21:0411:24 /mi+32.4%
Positive split — 32.4% slower in the second half
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Your race, unpacked

See your splits, ranks & AI insights.

Checkpoint Splits

CheckpointTimeAvg PaceSegment LengthSegment TimeSegment PaceTrendDiff
2M
19:489:542.00 mi19:48
9:54
-
4M
39:529:582.00 mi20:04
10:02
+0:08
6M
1:01:1310:122.00 mi21:21
10:40
+0:38
8M
1:21:4710:132.00 mi20:34
10:17
-0:23
9.6M
1:38:1510:141.60 mi16:28
10:17
0:00
10M
1:45:4010:340.40 mi7:25
18:34
+8:17
10.5M
1:48:0210:170.50 mi2:22
4:44
-13:50
12M
2:10:5110:541.50 mi22:49
15:13
+10:29
Finish(13.11 mi)
2:22:1710:511.11 mi11:26
10:18
-4:55
Trend:
Faster pace
Steady pace
Slower pace
Est.Checkpoint not recorded (estimated)
~Segment time uses estimated prior

Checkpoints & Pacing

Pace Line

Fastest Pace

4:44 /mi

Average Pace

10:51 /mi

Slowest Pace

18:34 /mi

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Fastest
Middle
Slowest
Average

Segments

Time at Faster Pace

2:22

2% of race

Time at Steady Pace

1:49:41

77% of race

Time at Slower Pace

30:14

21% of race

Average Pace: 10:51 /mi

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Faster pace (< avg)
Steady pace (≈ avg)
Slower pace (> avg)

Heatmap

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0mi3.3mi6.6mi9.8mi13.1mi
Pace:
Faster
Steady
Slower
Featured Segment

Garmin Challenge

Top 40%
Garmin Challenge
Course map with the garmin challenge highlighted
Garmin Challenge · 9.6–10.5 mi · © Mapbox © OpenStreetMap

9:47

Segment Time

10:52/mi

Pace

0.90 mi

Distance

Overall

2599

Men

1791

Division

210

See the full Garmin Challenge leaderboard

Checkpoint and Segment Rankings

CheckpointSeg. DistOverallMalesM20-29Seg. OverallSeg. MalesSeg. M20-29
2M2.00 mi2861197322736892316257
4M2.00 mi2811+501936+37231-428531965235
6M2.00 mi3076-2652096-160253-2235202331276
8M2.00 mi2955+1212047+49246+727191927217
9.6M1.60 mi3162-2072144-97256-1043382594282
10M0.40 mi3083+792090+54250+627391846214
10.5M0.50 mi3068+152079+11247+324681710207
12M1.50 mi3176-1082132-53252-536892316257
Finish(13.11 mi)1.11 mi3157+192117+15250+232542101240

Segment Performance Analysis

10.5M→12M

0.0 - 2.0 mi

Top 56%
~flat
+5ft-3ft

Overall

3689

Males

2316

M20-24

258

2M→4M

2.0 - 4.0 mi

Top 43%
×4story building
+67ft-69ft

Overall

2853

Males

1965

M20-24

237

4M→6M

4.0 - 6.0 mi

Top 54%
×9story building
+123ft-9ft

Overall

3520

Males

2331

M20-24

279

6M→8M

6.0 - 8.0 mi

Top 41%
×12story building
+166ft-53ft

Overall

2719

Males

1927

M20-24

218

8M→9.6M

8.0 - 9.6 mi

Top 66%
×13story building
+68ft-193ft

Overall

4338

Males

2594

M20-24

283

9.6M→10M

9.6 - 10.0 mi

Top 42%
×2story building
+0ft-24ft

Overall

2739

Males

1846

M20-24

215

10M→10.5M

10.0 - 10.5 mi

Top 38%
×6story building
+1ft-73ft

Overall

2468

Males

1710

M20-24

208

10.5M→12M

10.5 - 12.0 mi

Top 56%
×21story building
+280ft-26ft

Overall

3689

Males

2316

M20-24

258

12M→Finish

12.0 - 13.1 mi

Top 49%
×7story building
+14ft-89ft

Overall

3254

Males

2101

M20-24

240

Passing Analysis

Category:
Passed
621*
Passed By
917
Net Change
-296
SegmentPassedPassed ByNet ChangeStart RankEnd Rank
Start → 2M----#2861
2M → 4M179129+50#2861#2811
4M → 6M42307-265#2811#3076
6M → 8M193*72+121#3076#2955
8M → 9.6M21228-207#2955#3162
9.6M → 10M8910+79#3162#3083
10M → 10.5M172+15#3083#3068
10.5M → 12M34142-108#3068#3176
12M → Finish46*27+19#3176#3157
TOTALS621*917-296

* Includes athletes who did not complete a segment (DNF/DNQ).

Passing Charts

Category:
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Passing Circle

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Position Flow

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Race Lanes

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Official Timing Data

The San Francisco Marathon

The San Francisco Marathon

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