All Results|Race Analytics|Course
SF MARATHON 2ND HALF 2026

Shelby Decker

Bib: 25202•F•Age: 29

Concord, CA

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0:00
0:00
/ mi
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Overall
#0 / 3840
Gender (Female)
#0 / 1760
Top 48%
Division (F25-29)
#0 / 495
Race Day Weather
59°/49°F
scattered clouds

Race Timeline and Course Information

Your journey through the course with elevation, pacing, and checkpoint details

⏱️ Race Timeline

Watch your race unfold from start to finish

Start
0:00:00
Race begins
2M
21:44
Rank: #2726
Start → 2M
21:44 | 10:52/mi
4M
41:41
Rank: #2498 (+228)
2M → 4M
19:57 | 9:59/mi
6M
1:07:44
Rank: #2483 (+15)
4M → 6M
26:03 | 13:01/mi
8M
1:24:23
Rank: #2485 (-2)
6M → 8M
16:39 | 8:19/mi
10M
1:46:40
Rank: #2436 (+49)
8M → 10M
22:17 | 11:09/mi
12M
2:09:11
Rank: #2338 (+98)
10M → 12M
22:31 | 11:15/mi
Finish· 13.11 mi
2:20:47
Rank: #2292 (+46)
12M → Finish
11:36 | 10:28/mi
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Splits & Pacing

Detailed breakdown of your race performance at each timing point

Half Splits

1st HalfFaster
via 6M
Distance6.00 mi
Time1:07:44
Pace11:17 /mi
2nd Half
Distance7.11 mi
Time1:13:03
Pace10:17 /mi
📊Positive Split: 7.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
2M
2.00 mi09:08:1421:4410:5221:44
10:52
-
4M
4.00 mi09:28:1141:4110:2519:57
9:59
-0:53
6M
6.00 mi09:54:141:07:4411:1726:03
13:01
+3:02
8M
8.00 mi10:10:531:24:2310:3316:39
8:19
-4:42
10M
10.00 mi10:33:101:46:4010:4022:17
11:09
+2:50
12M
12.00 mi10:55:412:09:1110:4622:31
11:15
+0:06
Finish
13.11 mi11:07:172:20:4710:4411:36
10:28
-0:47

Checkpoint Splits Visualizations

Explore your race data through different visual perspectives. Scroll to discover each visualization.

📈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

8:19 /mi

Average Pace

10:44 /mi

Slowest Pace

13:01 /mi

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Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Bar length shows time spent in each segment. Colors mark your faster to slower segments, relative to your own pace.

Time at Faster Pace

36:36

26% of race

Time at Steady Pace

1:18:08

55% of race

Time at Slower Pace

26:03

19% of race

Average Pace: 10:44 /mi

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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.

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

Click or hover over segments to see details

✨Sparklines

Checkpoint Splits with Pace Trends

Enhanced split table showing pace trends through mini sparkline visualizations.

Overall Pace Trend

CheckpointDistanceTime of DayTimeAvg PaceSegmentPaceTrendRank
2M
2.00 mi09:08:1421:4410:5221:44
10:52
#2726
4M
4.00 mi09:28:1141:4110:2519:57
9:59
#2498
6M
6.00 mi09:54:141:07:4411:1726:03
13:01
#2483
8M
8.00 mi10:10:531:24:2310:3316:39
8:19
#2485
10M
10.00 mi10:33:101:46:4010:4022:17
11:09
#2436
12M
12.00 mi10:55:412:09:1110:4622:31
11:15
#2338
Finish
13.11 mi11:07:172:20:4710:4411:36
10:28
#2292
Faster pace
Steady pace
Slower pace

Rankings

Your position at each checkpoint and how you ranked in each segment

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF25-29Seg. OverallSeg. FemalesSeg. F25-29
2M2.00 mi2.00 mi272610833022058(Top 54%)769(Top 44%)228(Top 46%)
4M4.00 mi2.00 mi2498+228953+130272+302321(Top 60%)867(Top 49%)253(Top 51%)
6M6.00 mi2.00 mi2483+15942+11269+32469(Top 64%)938(Top 53%)273(Top 55%)
8M8.00 mi2.00 mi2485-2943-1276-72515(Top 65%)973(Top 55%)294(Top 59%)
10M10.00 mi2.00 mi2436+49913+30274+22288(Top 60%)852(Top 48%)254(Top 51%)
12M12.00 mi2.00 mi2338+98871+42261+132058(Top 54%)769(Top 44%)228(Top 46%)
Finish13.11 mi1.11 mi2292+46852+19258+31831(Top 48%)662(Top 38%)194(Top 39%)

Segment Performance Analysis

10M→12M

0.0 - 2.0 mi

Top 54%
×9stories
+138ft-68ft

Overall

2058

Females

769

F25-29

229

2M→4M

2.0 - 4.0 mi

Top 60%
×13stories
+163ft-19ft

Overall

2321

Females

867

F25-29

253

4M→6M

4.0 - 6.0 mi

Top 64%
×4stories
+55ft-83ft

Overall

2469

Females

938

F25-29

274

6M→8M

6.0 - 8.0 mi

Top 65%
×10stories
+65ft-151ft

Overall

2515

Females

973

F25-29

295

8M→10M

8.0 - 10.0 mi

Top 60%
×10stories
+61ft-174ft

Overall

2288

Females

852

F25-29

255

10M→12M

10.0 - 12.0 mi

Top 54%
×3stories
+41ft-53ft

Overall

2058

Females

769

F25-29

229

12M→Finish

12.0 - 13.1 mi

Top 48%
×1human
+6ft-6ft

Overall

1831

Females

662

F25-29

194

Passing

Athletes you passed and who passed you throughout the race

Passing Analysis

Category:
Athletes Passed
580*
Passed By
146
Net Change
+434
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 2M----#2726
2M → 4M25022+228#2726#2498
4M → 6M6348+15#2498#2483
6M → 8M4446-2#2483#2485
8M → 10M67*18+49#2485#2436
10M → 12M1035+98#2436#2338
12M → Finish53*7+46#2338#2292
TOTALS580*146+434

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

📊

Passing Analysis Visualizations

Explore your passing analysis through 5 different visualizations. Scroll to discover each one.

Time:
Category:

📈Position Graph

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🎨Heatmap Timeline

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🔄Passing Circle

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🌊Position Flow

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🏃Race Lanes

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Activity Data

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Official Timing Data

The San Francisco Marathon

The San Francisco Marathon