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SF MARATHON 1ST HALF 2026

Nathan Jacobson

San Francisco, CA

Bib: 17125 M 32

0:00
0:00
/ mi
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Overall
#0 / 6575
Top 48%
Gender (Male)
#0 / 3619
Division (M30-34)
#0 / 772
Race Day Weather
59°/49°F
scattered clouds

Race Timeline

Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
2M
10:46/mi
21:33
→ flat
4M
11:54/mi
45:21
↑ 67↓ 69
6M
10:25/mi
1:06:12
↑ 123
8M
11:51/mi
1:29:54
↑ 166↓ 53
9.6M
8:09/mi
1:42:57
↑ 68↓ 193
10M
18:44/mi
1:50:26
↓ 24
10.5M
4:58/mi
1:52:55
↓ 73
12M
13:12/mi
2:12:43
↑ 280
Finish· 13.11 mi
8:56/mi
2:22:37
↑ 14↓ 89
Course Elevation
10–277 ft
≈
×22story building
•▲ 774 ft climb · ▼ 557 ft descent

The Course

Half Splits

1st Half· via 6M
1:06:1211:02 /mi⚡ faster
2nd Half
1:16:2510:45 /mi+15.4%
Positive split — 15.4% slower in the second half
Is this your race?

Your race, unpacked

See your splits, ranks & AI insights.

Checkpoint Splits

CheckpointTimeAvg PaceSegment LengthSegment TimeSegment PaceTrendDiff
2M
21:3310:462.00 mi21:33
10:46
-
4M
45:2111:202.00 mi23:48
11:54
+1:08
6M
1:06:1211:022.00 mi20:51
10:25
-1:29
8M
1:29:5411:142.00 mi23:42
11:51
+1:26
9.6M
1:42:5710:431.60 mi13:03
8:09
-3:42
10M
1:50:2611:030.40 mi7:29
18:44
+10:35
10.5M
1:52:5510:450.50 mi2:29
4:58
-13:46
12M
2:12:4311:041.50 mi19:48
13:12
+8:14
Finish(13.11 mi)
2:22:3710:531.11 mi9:54
8:56
-4:16
Trend:
Faster pace
Steady pace
Slower pace

Checkpoints & Pacing

Pace Line

Fastest Pace

4:58 /mi

Average Pace

10:53 /mi

Slowest Pace

18:44 /mi

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Fastest
Middle
Slowest
Average

Segments

Time at Faster Pace

25:26

18% of race

Time at Steady Pace

1:29:54

63% of race

Time at Slower Pace

27:17

19% of race

Average Pace: 10:53 /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 42%
Garmin Challenge
Course map with the garmin challenge highlighted
Garmin Challenge · 9.6–10.5 mi · © Mapbox © OpenStreetMap

9:58

Segment Time

11:05/mi

Pace

0.90 mi

Distance

Overall

2793

Men

1883

Division

418

See the full Garmin Challenge leaderboard

Checkpoint and Segment Rankings

CheckpointSeg. DistOverallMalesM30-34Seg. OverallSeg. MalesSeg. M30-34
2M2.00 mi4332274257721061484331
4M2.00 mi4947-6153019-277632-5553333170676
6M2.00 mi4233+7142701+318568+6431952164452
8M2.00 mi4264-312733-32573-544232804602
9.6M1.60 mi3784+4802467+266517+5616911130242
10M0.40 mi3677+1072409+58509+828321893417
10.5M0.50 mi3667+102406+3508+130812050443
12M1.50 mi3357+3102228+178470+3821061484331
Finish(13.11 mi)1.11 mi3185+1722134+94453+1715741171258

Segment Performance Analysis

10.5M→12M

0.0 - 2.0 mi

Top 32%
~flat
+5ft-3ft

Overall

2106

Males

1484

M30-34

332

2M→4M

2.0 - 4.0 mi

Top 81%
×4story building
+67ft-69ft

Overall

5333

Males

3170

M30-34

679

4M→6M

4.0 - 6.0 mi

Top 49%
×9story building
+123ft-9ft

Overall

3195

Males

2164

M30-34

454

6M→8M

6.0 - 8.0 mi

Top 67%
×12story building
+166ft-53ft

Overall

4423

Males

2804

M30-34

604

8M→9.6M

8.0 - 9.6 mi

Top 26%
×13story building
+68ft-193ft

Overall

1691

Males

1130

M30-34

243

9.6M→10M

9.6 - 10.0 mi

Top 43%
×2story building
+0ft-24ft

Overall

2832

Males

1893

M30-34

418

10M→10.5M

10.0 - 10.5 mi

Top 47%
×6story building
+1ft-73ft

Overall

3081

Males

2050

M30-34

445

10.5M→12M

10.5 - 12.0 mi

Top 32%
×21story building
+280ft-26ft

Overall

2106

Males

1484

M30-34

332

12M→Finish

12.0 - 13.1 mi

Top 24%
×7story building
+14ft-89ft

Overall

1574

Males

1171

M30-34

258

Passing Analysis

Category:
▲Net Change
+0
0 passed by0* passed
SegmentMovementRank
Start → 2M-#4332
2M → 4M
66146-615
#4332 → #4947
4M → 6M
3717*+714
#4947 → #4233
6M → 8M
197166*-31
#4233 → #4264
8M → 9.6M
3483+480
#4264 → #3784
9.6M → 10M
6113+107
#3784 → #3677
10M → 10.5M
616+10
#3677 → #3667
10.5M → 12M
8318*+310
#3667 → #3357
12M → Finish
1173*+172
#3357 → #3185
TOTALS
8852032*+1147
#4332 → #3185

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

Passing Visualized

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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