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BOSTON MARATHON 2023

Esther Ahn

Bib: 29854•F

MA

0:00
0:00
/ mi
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Division (F18-39)
#0 / 4884
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent
Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
5K· 3.11 mi
11:08/mi
34:34
↑ 97↓ 3451.5%
10K· 6.21 mi
10:37/mi
1:07:33
↑ 79↓ 1380.4%
15K· 9.32 mi
10:38/mi
1:40:36
↑ 67↓ 78
20K· 12.43 mi
11:31/mi
2:16:24
↑ 106↓ 860.1%
Half· 13.11 mi
10:43/mi
2:23:43
↑ 19↓ 370.5%
25K· 15.53 mi
10:59/mi
2:50:21
↑ 66↓ 880.2%
30K· 18.64 mi
13:02/mi
3:30:50
↑ 181↓ 1480.2%
20M
13:27/mi
3:49:06
↑ 64↓ 500.2%
21M
18:19/mi
4:07:25
↑ 106↓ 241.6%
35K· 21.75 mi
11:06/mi
4:15:43
↑ 17↓ 861.7%
23M
12:20/mi
4:31:09
↑ 23↓ 630.6%
24M
12:59/mi
4:44:08
↓ 821.3%
40K· 24.85 mi
12:16/mi
4:54:37
↓ 200.3%
25.2M
15:51/mi
5:00:05
↑ 13↓ 160.2%
Finish· 26.22 mi
10:36/mi
5:10:53
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:23:43
Pace10:58 /mi
2nd Half
Distance13.11 mi
Time2:47:10
Pace12:45 /mi
📊Positive Split: 16.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:52:3134:3411:0834:34
11:08
-
10K
6.21 mi12:25:301:07:3310:5232:59
10:37
-0:31
15K
9.32 mi12:58:331:40:3610:4833:03
10:38
+0:01
20K
12.43 mi13:34:212:16:2410:5935:48
11:31
+0:53
Half
13.11 mi13:41:402:23:4310:587:19
10:43
-0:48
25K
15.53 mi14:08:182:50:2110:5826:38
10:59
+0:16
30K
18.64 mi14:48:473:30:5011:1940:29
13:02
+2:03
20M
20.00 mi15:07:033:49:0611:2718:16
13:27
+0:25
21M
21.00 mi15:25:224:07:2511:4718:19
18:19
+4:52
35K
21.75 mi15:33:404:15:4311:458:18
11:06
-7:13
23M
23.00 mi15:49:064:31:0911:4715:26
12:20
+1:14
24M
24.00 mi16:02:054:44:0811:5012:59
12:59
+0:39
40K
24.85 mi16:12:344:54:3711:5110:29
12:16
-0:43
25.2M
25.20 mi16:18:025:00:0511:545:28
15:51
+3:35
Finish
26.22 mi16:28:505:10:5311:5210:48
10:36
-5:15

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

10:36 /mi

Average Pace

11:52 /mi

Slowest Pace

18:19 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

0:00

0% of race

Time at Steady Pace

3:35:22

69% of race

Time at Slower Pace

1:35:31

31% of race

Average Pace: 11:51 /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
5K
3.11 mi11:52:3134:3411:0834:34
11:08
#25847
10K
6.21 mi12:25:301:07:3310:5232:59
10:37
#25404
15K
9.32 mi12:58:331:40:3610:4833:03
10:38
#25131
20K
12.43 mi13:34:212:16:2410:5935:48
11:31
#25176
Half
13.11 mi13:41:402:23:4310:587:19
10:43
#25144
25K
15.53 mi14:08:182:50:2110:5826:38
10:59
#24959
30K
18.64 mi14:48:473:30:5011:1940:29
13:02
#25109
20M
20.00 mi15:07:033:49:0611:2718:16
13:27
#25172
21M
21.00 mi15:25:224:07:2511:4718:19
18:19
#25397
35K
21.75 mi15:33:404:15:4311:458:18
11:06
#25342
23M
23.00 mi15:49:064:31:0911:4715:26
12:20
#25310
24M
24.00 mi16:02:054:44:0811:5012:59
12:59
#25330
40K
24.85 mi16:12:344:54:3711:5110:29
12:16
#25301
25.2M
25.20 mi16:18:025:00:0511:545:28
15:51
#25321
Finish
26.22 mi16:28:505:10:5311:5210:48
10:36
#25268
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi25847109541095424706(Top 93%)10299(Top 90%)10299(Top 211%)
10K6.21 mi3.10 mi25404+44310670+28410670+28424888(Top 93%)10380(Top 91%)10380(Top 213%)
15K9.32 mi3.11 mi25131+27310515+15510515+15524706(Top 93%)10299(Top 90%)10299(Top 211%)
20K12.43 mi3.11 mi25176-4510554-3910554-3925271(Top 95%)10641(Top 93%)10641(Top 218%)
Half13.11 mi0.68 mi25144+3210537+1710537+1724571(Top 92%)10255(Top 90%)10255(Top 210%)
25K15.53 mi2.42 mi24959+18510440+9710440+9723960(Top 90%)9934(Top 87%)9934(Top 203%)
30K18.64 mi3.11 mi25109-15010550-11010550-11025442(Top 96%)10812(Top 95%)10812(Top 221%)
20M20.00 mi1.36 mi25172-6310592-4210592-4225505(Top 96%)10862(Top 95%)10862(Top 222%)
21M21.00 mi1.00 mi25397-22510731-13910731-13926567(Top 100%)11400(Top 100%)11400(Top 233%)
35K21.75 mi0.75 mi25342+5510705+2610705+2623489(Top 88%)9873(Top 86%)9873(Top 202%)
23M23.00 mi1.25 mi25310+3210692+1310692+1324403(Top 92%)10342(Top 91%)10342(Top 212%)
24M24.00 mi1.00 mi25330-2010705-1310705-1325460(Top 96%)10907(Top 95%)10907(Top 223%)
40K24.85 mi0.85 mi25301+2910691+1410691+1424194(Top 91%)10279(Top 90%)10279(Top 210%)
25.2M25.20 mi0.35 mi25321-2010706-1510706-1526077(Top 98%)11198(Top 98%)11198(Top 229%)
Finish26.22 mi1.02 mi25268+5310683+2310683+2323221(Top 87%)9764(Top 85%)9764(Top 200%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 93%
×21story building
+97ft-345ft

Overall

24706

Females

10299

F18-39

10299

5K→10K

3.1 - 6.2 mi

Top 93%
×5story building
+79ft-138ft

Overall

24888

Females

10380

F18-39

10380

10K→15K

6.2 - 9.3 mi

Top 93%
×3story building
+67ft-78ft

Overall

24706

Females

10299

F18-39

10299

15K→20K

9.3 - 12.4 mi

Top 95%
×5story building
+106ft-86ft

Overall

25271

Females

10641

F18-39

10641

20K→Half

12.4 - 13.1 mi

Top 92%
×2story building
+19ft-37ft

Overall

24571

Females

10255

F18-39

10255

Half→25K

13.1 - 15.5 mi

Top 90%
×4story building
+66ft-88ft

Overall

23960

Females

9934

F18-39

9934

25K→30K

15.5 - 18.6 mi

Top 96%
×9story building
+181ft-148ft

Overall

25442

Females

10812

F18-39

10812

30K→20M

18.6 - 20.0 mi

Top 96%
×5story building
+64ft-50ft

Overall

25505

Females

10862

F18-39

10862

20M→21M

20.0 - 21.0 mi

Top 100%
×8story building
+106ft-24ft

Overall

26567

Females

11400

F18-39

11400

21M→35K

21.0 - 21.8 mi

Top 88%
×7story building
+17ft-86ft

Overall

23489

Females

9873

F18-39

9873

35K→23M

21.8 - 23.0 mi

Top 92%
×5story building
+23ft-63ft

Overall

24403

Females

10342

F18-39

10342

23M→24M

23.0 - 24.0 mi

Top 96%
×6story building
+12ft-82ft

Overall

25460

Females

10907

F18-39

10907

24M→40K

24.0 - 24.9 mi

Top 91%
×1story
+6ft-20ft

Overall

24194

Females

10279

F18-39

10279

40K→25.2M

24.9 - 25.2 mi

Top 98%
×1story
+13ft-16ft

Overall

26077

Females

11198

F18-39

11198

25.2M→Finish

25.2 - 26.2 mi

Top 87%
×2story building
+22ft-21ft

Overall

23221

Females

9764

F18-39

9764

Passing Analysis

Category:
Athletes Passed
1330
Passed By
751
Net Change
+579
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#25847
5K → 10K46421+443#25847#25404
10K → 15K28411+273#25404#25131
15K → 20K75120-45#25131#25176
20K → Half408+32#25176#25144
Half → 25K1916+185#25144#24959
25K → 30K39189-150#24959#25109
30K → 20M1982-63#25109#25172
20M → 21M1226-225#25172#25397
21M → 35K550+55#25397#25342
35K → 23M5119+32#25342#25310
23M → 24M1939-20#25310#25330
24M → 40K367+29#25330#25301
40K → 25.2M121-20#25301#25321
25.2M → Finish552+53#25321#25268
TOTALS1330751+579
📊

Passing Visuals

Category:
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🔄Passing Circle

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🌊Position Flow

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🏃Race Lanes

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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing