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SF MARATHON 2026

Jefferson Lai

Bib: 2734•M•Age: 33

Menlo Park, CA

0:00
0:00
/ mi
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Overall
#0 / 7166
Top 14%
Gender (Male)
#0 / 5052
Top 17%
Division (M30-34)
#0 / 1040
Top 18%
Race Day Weather
59°/49°F
scattered clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
2M
18:29
Rank: #2813
Start → 2M
18:29 | 9:14/mi
4M
36:00
Rank: #2206 (+607)
2M → 4M
17:31 | 8:46/mi
6M
53:31
Rank: #2019 (+187)
4M → 6M
17:31 | 8:45/mi
8M
1:10:48
Rank: #1953 (+66)
6M → 8M
17:17 | 8:38/mi
9.6M
1:24:41
Rank: #1780 (+173)
8M → 9.6M
13:53 | 8:41/mi
10M
1:26:55
Rank: #1745 (+35)
9.6M → 10M
2:14 | 5:35/mi
10.5M
1:34:21
Rank: #2004 (-259)
10M → 10.5M
7:26 | 14:52/mi
12M
1:46:17
Rank: #1878 (+126)
10.5M → 12M
11:56 | 7:57/mi
14M
2:04:40
Rank: #1792 (+86)
12M → 14M
18:23 | 9:11/mi
16M
2:20:58
Rank: #1835 (-43)
14M → 16M
16:18 | 8:09/mi
18M
2:37:16
Rank: #1490 (+345)
16M → 18M
16:18 | 8:09/mi
20M
2:53:49
Rank: #1351 (+139)
18M → 20M
16:33 | 8:16/mi
22M
3:09:16
Rank: #1226 (+125)
20M → 22M
15:27 | 7:43/mi
24M
3:26:07
Rank: #1090 (+136)
22M → 24M
16:51 | 8:26/mi
Finish· 26.22 mi
3:44:00
Rank: #987 (+103)
24M → Finish
17:53 | 8:04/mi

The Course

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Half Splits

1st Half· via 14M
Distance14.00 mi
Time2:04:40
Pace8:54 /mi
2nd Half✓ Faster
Distance12.22 mi
Time1:39:20
Pace8:08 /mi
📊Negative Split: 20.3% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
2M
2.00 mi05:35:1218:299:1418:29
9:14
-
4M
4.00 mi05:52:4336:009:0017:31
8:46
-0:28
6M
6.00 mi06:10:1453:318:5517:31
8:45
-0:01
8M
8.00 mi06:27:311:10:488:5117:17
8:38
-0:07
9.6M
9.60 mi06:41:241:24:418:4913:53
8:41
+0:03
10M
10.00 mi06:43:381:26:558:422:14
5:35
-3:06
10.5M
10.50 mi06:51:041:34:218:597:26
14:52
+9:17
12M
12.00 mi07:03:001:46:178:5111:56
7:57
-6:55
14M
14.00 mi07:21:232:04:408:5418:23
9:11
+1:14
16M
16.00 mi07:37:412:20:588:4916:18
8:09
-1:02
18M
18.00 mi07:53:592:37:168:4416:18
8:09
0:00
20M
20.00 mi08:10:322:53:498:4116:33
8:16
+0:07
22M
22.00 mi08:25:593:09:168:3615:27
7:43
-0:33
24M
24.00 mi08:42:503:26:078:3516:51
8:26
+0:43
Finish
26.22 mi09:00:433:44:008:3317:53
8:04
-0:22

Checkpoints & Pacing

📈Pace Line

Pace Progression

Track your pace changes throughout the race. Dot colors mark your quickest to easiest segments, relative to your own pace.

Fastest Pace

5:35 /mi

Average Pace

8:33 /mi

Slowest Pace

14:52 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:14

1% of race

Time at Steady Pace

3:34:20

96% of race

Time at Slower Pace

7:26

3% of race

Average Pace: 8:33 /mi

Loading chart...
Faster pace (< avg)
Steady pace (≈ avg)
Slower pace (> avg)

🎨Heatmap

Pace Heatmap

Where you sped up and eased off relative to your own pace across the race. Colors are relative to your own range, not to other runners.

Loading...
0mi6.6mi13.1mi19.7mi26.2mi
Pace:
Faster
Steady
Slower

Click or hover over segments to see details

✨Sparklines

Checkpoint Splits with Pace Trends

Overall Pace Trend

CheckpointDistanceTime of DayTimeAvg PaceSegmentPaceTrendRank
2M
2.00 mi05:35:1218:299:1418:29
9:14
#2813
4M
4.00 mi05:52:4336:009:0017:31
8:46
#2206
6M
6.00 mi06:10:1453:318:5517:31
8:45
#2019
8M
8.00 mi06:27:311:10:488:5117:17
8:38
#1953
9.6M
9.60 mi06:41:241:24:418:4913:53
8:41
#1780
10M
10.00 mi06:43:381:26:558:422:14
5:35
#1745
10.5M
10.50 mi06:51:041:34:218:597:26
14:52
#2004
12M
12.00 mi07:03:001:46:178:5111:56
7:57
#1878
14M
14.00 mi07:21:232:04:408:5418:23
9:11
#1792
16M
16.00 mi07:37:412:20:588:4916:18
8:09
#1835
18M
18.00 mi07:53:592:37:168:4416:18
8:09
#1490
20M
20.00 mi08:10:322:53:498:4116:33
8:16
#1351
22M
22.00 mi08:25:593:09:168:3615:27
7:43
#1226
24M
24.00 mi08:42:503:26:078:3516:51
8:26
#1090
Finish
26.22 mi09:00:433:44:008:3317:53
8:04
#987
Faster pace
Steady pace
Slower pace
Est.Checkpoint not recorded (estimated)
~Segment time uses estimated prior
Garmin Challenge
Featured Segment

Garmin Challenge

The climb, presented by Garmin

Top 54%
Garmin Challenge
Course map with the garmin challenge highlighted
Garmin Challenge · 9.6–10.5 mi · © Mapbox © OpenStreetMap

9:40

Segment Time

10:45/mi

Pace

0.90 mi

Distance

Overall

3896

Men

3066

Division

647

See the full Garmin Challenge leaderboard

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM30-34Seg. OverallSeg. MalesSeg. M30-34
2M2.00 mi2.00 mi281323084801198(Top 17%)1048(Top 21%)223(Top 21%)
4M4.00 mi2.00 mi2206+6071861+447391+891747(Top 24%)1496(Top 30%)317(Top 30%)
6M6.00 mi2.00 mi2019+1871718+143362+291746(Top 24%)1492(Top 30%)310(Top 30%)
8M8.00 mi2.00 mi1953+661666+52348+141793(Top 25%)1536(Top 30%)335(Top 32%)
9.6M9.60 mi1.60 mi1780+1731526+140323+251171(Top 16%)1039(Top 21%)218(Top 21%)
10M10.00 mi0.40 mi1745+351499+27319+4883(Top 12%)787(Top 16%)178(Top 17%)
10.5M10.50 mi0.50 mi2004-2591709-210360-415017(Top 70%)3747(Top 74%)768(Top 74%)
12M12.00 mi1.50 mi1878+1261609+100336+241198(Top 17%)1048(Top 21%)223(Top 21%)
14M14.00 mi2.00 mi1792+861532+77328+81431(Top 20%)1242(Top 25%)270(Top 26%)
16M16.00 mi2.00 mi1835-431558-26326+22368(Top 33%)1892(Top 37%)373(Top 36%)
18M18.00 mi2.00 mi1490+3451282+276265+61522(Top 7%)462(Top 9%)98(Top 9%)
20M20.00 mi2.00 mi1351+1391164+118241+24714(Top 10%)630(Top 12%)138(Top 13%)
22M22.00 mi2.00 mi1226+1251054+110225+16628(Top 9%)540(Top 11%)118(Top 11%)
24M24.00 mi2.00 mi1090+136941+113204+21436(Top 6%)394(Top 8%)87(Top 8%)
Finish26.22 mi2.22 mi987+103852+89191+13400(Top 6%)352(Top 7%)73(Top 7%)

Segment Performance Analysis

10.5M→12M

0.0 - 2.0 mi

Top 17%
×1human
+6ft-11ft

Overall

1198

Males

1048

M30-34

225

2M→4M

2.0 - 4.0 mi

Top 24%
×4stories
+75ft-70ft

Overall

1747

Males

1496

M30-34

319

4M→6M

4.0 - 6.0 mi

Top 24%
×5stories
+71ft-18ft

Overall

1746

Males

1492

M30-34

312

6M→8M

6.0 - 8.0 mi

Top 25%
×9stories
+106ft-21ft

Overall

1793

Males

1536

M30-34

337

8M→9.6M

8.0 - 9.6 mi

Top 16%
×13stories
+117ft-177ft

Overall

1171

Males

1039

M30-34

220

9.6M→10M

9.6 - 10.0 mi

Top 12%
×1story
+17ft-12ft

Overall

883

Males

787

M30-34

180

10M→10.5M

10.0 - 10.5 mi

Top 70%
×9stories
+0ft-102ft

Overall

5017

Males

3747

M30-34

771

10.5M→12M

10.5 - 12.0 mi

Top 17%
×18stories
+304ft-125ft

Overall

1198

Males

1048

M30-34

225

12M→14M

12.0 - 14.0 mi

Top 20%
×9stories
+99ft-125ft

Overall

1431

Males

1242

M30-34

272

14M→16M

14.0 - 16.0 mi

Top 33%
×9stories
+124ft-78ft

Overall

2368

Males

1892

M30-34

374

16M→18M

16.0 - 18.0 mi

Top 7%
×8stories
+106ft-45ft

Overall

522

Males

462

M30-34

99

18M→20M

18.0 - 20.0 mi

Top 10%
×3stories
+52ft-26ft

Overall

714

Males

630

M30-34

138

20M→22M

20.0 - 22.0 mi

Top 9%
×21stories
+17ft-266ft

Overall

628

Males

540

M30-34

118

22M→24M

22.0 - 24.0 mi

Top 6%
×3stories
+70ft-85ft

Overall

436

Males

394

M30-34

87

24M→Finish

24.0 - 26.2 mi

Top 6%
~flat
+2ft-2ft

Overall

400

Males

352

M30-34

73

Passing Analysis

Category:
Athletes Passed
2265*
Passed By
439
Net Change
+1826
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 2M----#2813
2M → 4M613*6+607#2813#2206
4M → 6M1969+187#2206#2019
6M → 8M80*14+66#2019#1953
8M → 9.6M1785+173#1953#1780
9.6M → 10M350+35#1780#1745
10M → 10.5M8267-259#1745#2004
10.5M → 12M1271+126#2004#1878
12M → 14M97*11+86#1878#1792
14M → 16M81*124-43#1792#1835
16M → 18M3450+345#1835#1490
18M → 20M140*1+139#1490#1351
20M → 22M126*1+125#1351#1226
22M → 24M136*0+136#1226#1090
24M → Finish103*0+103#1090#987
TOTALS2265*439+1826

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

📊

Passing Visuals

Category:
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🔥Passing Intensity

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🔄Passing Circle

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🌊Position Flow

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🏃Race Lanes

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