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BOSTON MARATHON 2026

Esther Koh

Bib: 29813•F

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0:00
0:00
/ mi
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Overall
#0 / 29021
Gender (Female)
#0 / 12578
Age Group (F18-39)
#0 / 5716
Race Day Weather
51°/41°F
overcast 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
5K
35:47
3.11 mi
Rank: #28534
Start → 5K
35:47 | 11:32/mi
10K
1:15:35
6.21 mi
Rank: #28806 (-272)
5K → 10K
39:48 | 12:49/mi
15K
1:53:32
9.32 mi
Rank: #28724 (+82)
10K → 15K
37:57 | 12:13/mi
20K
2:34:11
12.43 mi
Rank: #28730 (-6)
15K → 20K
40:39 | 13:06/mi
HALF
2:42:32
13.11 mi
Rank: #28725 (+5)
20K → HALF
8:21 | 12:15/mi
25K
3:13:39
15.53 mi
Rank: #28637 (+88)
HALF → 25K
31:07 | 12:50/mi
30K
3:56:48
18.64 mi
Rank: #28608 (+29)
25K → 30K
43:09 | 13:54/mi
20M
4:14:23
20.00 mi
Rank: #28541 (+67)
30K → 20M
17:35 | 12:57/mi
21M
4:27:35
21.00 mi
Rank: #28478 (+63)
20M → 21M
13:12 | 13:12/mi
35K
4:37:00
21.75 mi
Rank: #28459 (+19)
21M → 35K
9:25 | 12:36/mi
23M
4:53:30
23.00 mi
Rank: #28429 (+30)
35K → 23M
16:30 | 13:12/mi
24M
5:06:00
24.00 mi
Rank: #28390 (+39)
23M → 24M
12:30 | 12:30/mi
40K
5:16:59
24.85 mi
Rank: #28361 (+29)
24M → 40K
10:59 | 12:51/mi
25.2M
5:21:39
25.20 mi
Rank: #28350 (+11)
40K → 25.2M
4:40 | 13:32/mi
FINISH
5:33:31
26.22 mi
Rank: #28295 (+55)
25.2M → FINISH
11:52 | 11:39/mi

Splits & Pacing

Detailed breakdown of your race performance at each timing point

Half Splits

1st HalfFaster
via HALF
Distance13.11 mi
Time2:42:32
Pace12:24 /mi
2nd Half
Distance13.11 mi
Time2:50:59
Pace13:03 /mi
📊Positive Split: 5.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi12:00:3935:4711:3235:47
11:32
-
10K
6.21 mi12:40:271:15:3512:1039:48
12:49
+1:17
15K
9.32 mi13:18:241:53:3212:1137:57
12:13
-0:36
20K
12.43 mi13:59:032:34:1112:2540:39
13:06
+0:53
HALF
13.11 mi14:07:242:42:3212:248:21
12:15
-0:51
25K
15.53 mi14:38:313:13:3912:2831:07
12:50
+0:35
30K
18.64 mi15:21:403:56:4812:4343:09
13:54
+1:04
20M
20.00 mi15:39:154:14:2312:4417:35
12:57
-0:57
21M
21.00 mi15:52:274:27:3512:4513:12
13:12
+0:15
35K
21.75 mi16:01:524:37:0012:459:25
12:36
-0:36
23M
23.00 mi16:18:224:53:3012:4616:30
13:12
+0:36
24M
24.00 mi16:30:525:06:0012:4612:30
12:30
-0:42
40K
24.85 mi16:41:515:16:5912:4610:59
12:51
+0:21
25.2M
25.20 mi16:46:315:21:3912:464:40
13:32
+0:41
FINISH
26.22 mi16:58:235:33:3112:4411:52
11:39
-1:53

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

11:32 /mi

Average Pace

12:44 /mi

Slowest Pace

13:54 /mi

Loading chart...
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

1:46:27

32% of race

Time at Steady Pace

2:29:33

45% of race

Time at Slower Pace

1:17:31

23% of race

Average Pace: 12:43 /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

Enhanced split table showing pace trends through mini sparkline visualizations.

Overall Pace Trend

CheckpointDistanceTime of DayTimeAvg PaceSegmentPaceTrendRank
5K
3.11 mi12:00:3935:4711:3235:47
11:32
#28534
10K
6.21 mi12:40:271:15:3512:1039:48
12:49
#28806
15K
9.32 mi13:18:241:53:3212:1137:57
12:13
#28724
20K
12.43 mi13:59:032:34:1112:2540:39
13:06
#28730
HALF
13.11 mi14:07:242:42:3212:248:21
12:15
#28725
25K
15.53 mi14:38:313:13:3912:2831:07
12:50
#28637
30K
18.64 mi15:21:403:56:4812:4343:09
13:54
#28608
20M
20.00 mi15:39:154:14:2312:4417:35
12:57
#28541
21M
21.00 mi15:52:274:27:3512:4513:12
13:12
#28478
35K
21.75 mi16:01:524:37:0012:459:25
12:36
#28459
23M
23.00 mi16:18:224:53:3012:4616:30
13:12
#28429
24M
24.00 mi16:30:525:06:0012:4612:30
12:30
#28390
40K
24.85 mi16:41:515:16:5912:4610:59
12:51
#28361
25.2M
25.20 mi16:46:315:21:3912:464:40
13:32
#28350
FINISH
26.22 mi16:58:235:33:3112:4411:52
11:39
#28295
Faster pace
Steady pace
Slower pace

Rankings

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

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi28534122401224028502(Top 98%)12237(Top 97%)12237(Top 214%)
10K6.21 mi3.10 mi28806-27212434-19412434-19428895(Top 100%)12496(Top 99%)12496(Top 219%)
15K9.32 mi3.11 mi28724+8212374+6012374+6028502(Top 98%)12237(Top 97%)12237(Top 214%)
20K12.43 mi3.11 mi28730-612381-712381-728652(Top 99%)12352(Top 98%)12352(Top 216%)
HALF13.11 mi0.68 mi28725+512379+212379+228396(Top 98%)12202(Top 97%)12202(Top 213%)
25K15.53 mi2.42 mi28637+8812321+5812321+5828138(Top 97%)12034(Top 96%)12034(Top 211%)
30K18.64 mi3.11 mi28608+2912311+1012311+1028300(Top 98%)12189(Top 97%)12189(Top 213%)
20M20.00 mi1.36 mi28541+6712273+3812273+3827382(Top 94%)11690(Top 93%)11690(Top 205%)
21M21.00 mi1.00 mi28478+6312237+3612237+3626588(Top 92%)11329(Top 90%)11329(Top 198%)
35K21.75 mi0.75 mi28459+1912225+1212225+1227372(Top 94%)11754(Top 93%)11754(Top 206%)
23M23.00 mi1.25 mi28429+3012207+1812207+1827539(Top 95%)11834(Top 94%)11834(Top 207%)
24M24.00 mi1.00 mi28390+3912189+1812189+1827176(Top 94%)11712(Top 93%)11712(Top 205%)
40K24.85 mi0.85 mi28361+2912171+1812171+1826914(Top 93%)11599(Top 92%)11599(Top 203%)
25.2M25.20 mi0.35 mi28350+1112164+712164+726757(Top 92%)11511(Top 92%)11511(Top 201%)
FINISH26.22 mi1.02 mi28295+5512132+3212132+3227077(Top 93%)11681(Top 93%)11681(Top 204%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 98%
×21
+97ft-345ft

Overall

28502

Females

12237

F18-39

12237

5K→10K

3.1 - 6.2 mi

Top 100%
×5
+79ft-138ft

Overall

28895

Females

12496

F18-39

12496

10K→15K

6.2 - 9.3 mi

Top 98%
×3
+67ft-78ft

Overall

28502

Females

12237

F18-39

12237

15K→20K

9.3 - 12.4 mi

Top 99%
×5
+106ft-86ft

Overall

28652

Females

12352

F18-39

12352

20K→HALF

12.4 - 13.1 mi

Top 98%
×2
+19ft-37ft

Overall

28396

Females

12202

F18-39

12202

HALF→25K

13.1 - 15.5 mi

Top 97%
×4
+66ft-88ft

Overall

28138

Females

12034

F18-39

12034

25K→30K

15.5 - 18.6 mi

Top 98%
×9
+181ft-148ft

Overall

28300

Females

12189

F18-39

12189

30K→20M

18.6 - 20.0 mi

Top 94%
×5
+64ft-50ft

Overall

27382

Females

11690

F18-39

11690

20M→21M

20.0 - 21.0 mi

Top 92%
×8
+106ft-24ft

Overall

26588

Females

11329

F18-39

11329

21M→35K

21.0 - 21.8 mi

Top 94%
×7
+17ft-86ft

Overall

27372

Females

11754

F18-39

11754

35K→23M

21.8 - 23.0 mi

Top 95%
×5
+23ft-63ft

Overall

27539

Females

11834

F18-39

11834

23M→24M

23.0 - 24.0 mi

Top 94%
×6
+12ft-82ft

Overall

27176

Females

11712

F18-39

11712

24M→40K

24.0 - 24.9 mi

Top 93%
×1
+6ft-20ft

Overall

26914

Females

11599

F18-39

11599

40K→25.2M

24.9 - 25.2 mi

Top 92%
×1
+13ft-16ft

Overall

26757

Females

11511

F18-39

11511

25.2M→FINISH

25.2 - 26.2 mi

Top 93%
×2
+22ft-21ft

Overall

27077

Females

11681

F18-39

11681

Passing

Athletes you passed and who passed you throughout the race

Passing Analysis

Category:
Athletes Passed
615
Passed By
376
Net Change
+239
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#28534
5K → 10K6278-272#28534#28806
10K → 15K897+82#28806#28724
15K → 20K3945-6#28724#28730
20K → HALF83+5#28730#28725
HALF → 25K924+88#28725#28637
25K → 30K5425+29#28637#28608
30K → 20M670+67#28608#28541
20M → 21M641+63#28541#28478
21M → 35K212+19#28478#28459
35K → 23M333+30#28459#28429
23M → 24M412+39#28429#28390
24M → 40K323+29#28390#28361
40K → 25.2M110+11#28361#28350
25.2M → FINISH583+55#28350#28295
TOTALS615376+239
📊

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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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing