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BOSTON MARATHON 2023

Erin Caswell

Bib: 12172•F

VA

0:00
0:00
/ mi
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Overall
#0 / 26622
Top 13%
Gender (Female)
#0 / 11423
Top 2%
Division (F18-39)
#0 / 4884
Top 3%
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
6:54/mi
21:26
↑ 97↓ 3451.5%
10K· 6.21 mi
6:46/mi
42:26
↑ 79↓ 1380.4%
15K· 9.32 mi
6:47/mi
1:03:29
↑ 67↓ 78
20K· 12.43 mi
6:46/mi
1:24:31
↑ 106↓ 860.1%
Half· 13.11 mi
6:37/mi
1:29:02
↑ 19↓ 370.5%
25K· 15.53 mi
6:42/mi
1:45:17
↑ 66↓ 880.2%
30K· 18.64 mi
6:49/mi
2:06:27
↑ 181↓ 1480.2%
20M
6:49/mi
2:15:43
↑ 64↓ 500.2%
21M
7:06/mi
2:22:49
↑ 106↓ 241.6%
35K· 21.75 mi
6:37/mi
2:27:46
↑ 17↓ 861.7%
23M
6:43/mi
2:36:11
↑ 23↓ 630.6%
24M
6:36/mi
2:42:47
↓ 821.3%
40K· 24.85 mi
6:47/mi
2:48:35
↓ 200.3%
25.2M
7:21/mi
2:51:07
↑ 13↓ 160.2%
Finish· 26.22 mi
6:29/mi
2:57:43
↑ 22↓ 21

The Course

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Half Splits

1st Half· via Half⚖️ Balanced
Distance13.11 mi
Time1:29:02
Pace6:47 /mi
2nd Half⚖️ Balanced
Distance13.11 mi
Time1:28:41
Pace6:46 /mi
📊Even Split: Consistent pacing between halves

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:48:5321:266:5421:26
6:54
-
10K
6.21 mi11:09:5342:266:5021:00
6:46
-0:08
15K
9.32 mi11:30:561:03:296:4921:03
6:47
+0:01
20K
12.43 mi11:51:581:24:316:4821:02
6:46
-0:01
Half
13.11 mi11:56:291:29:026:474:31
6:37
-0:09
25K
15.53 mi12:12:441:45:176:4716:15
6:42
+0:05
30K
18.64 mi12:33:542:06:276:4721:10
6:49
+0:07
20M
20.00 mi12:43:102:15:436:479:16
6:49
0:00
21M
21.00 mi12:50:162:22:496:487:06
7:06
+0:17
35K
21.75 mi12:55:132:27:466:484:57
6:37
-0:29
23M
23.00 mi13:03:382:36:116:478:25
6:43
+0:06
24M
24.00 mi13:10:142:42:476:476:36
6:36
-0:07
40K
24.85 mi13:16:022:48:356:475:48
6:47
+0:11
25.2M
25.20 mi13:18:342:51:076:472:32
7:21
+0:34
Finish
26.22 mi13:25:102:57:436:476:36
6:29
-0:52

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

6:29 /mi

Average Pace

6:47 /mi

Slowest Pace

7:21 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:55:11

99% of race

Time at Steady Pace

2:32

1% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:47 /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 mi10:48:5321:266:5421:26
6:54
#5561
10K
6.21 mi11:09:5342:266:5021:00
6:46
#5216
15K
9.32 mi11:30:561:03:296:4921:03
6:47
#5101
20K
12.43 mi11:51:581:24:316:4821:02
6:46
#4859
Half
13.11 mi11:56:291:29:026:474:31
6:37
#4783
25K
15.53 mi12:12:441:45:176:4716:15
6:42
#4483
30K
18.64 mi12:33:542:06:276:4721:10
6:49
#4150
20M
20.00 mi12:43:102:15:436:479:16
6:49
#4022
21M
21.00 mi12:50:162:22:496:487:06
7:06
#3877
35K
21.75 mi12:55:132:27:466:484:57
6:37
#3828
23M
23.00 mi13:03:382:36:116:478:25
6:43
#3662
24M
24.00 mi13:10:142:42:476:476:36
6:36
#3576
40K
24.85 mi13:16:022:48:356:475:48
6:47
#3509
25.2M
25.20 mi13:18:342:51:076:472:32
7:21
#3486
Finish
26.22 mi13:25:102:57:436:476:36
6:29
#3400
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi55614304304892(Top 18%)335(Top 3%)335(Top 7%)
10K6.21 mi3.10 mi5216+345379+51379+514922(Top 18%)349(Top 3%)349(Top 7%)
15K9.32 mi3.11 mi5101+115361+18361+184892(Top 18%)335(Top 3%)335(Top 7%)
20K12.43 mi3.11 mi4859+242330+31330+314187(Top 16%)261(Top 2%)261(Top 5%)
Half13.11 mi0.68 mi4783+76322+8322+83678(Top 14%)197(Top 2%)197(Top 4%)
25K15.53 mi2.42 mi4483+300285+37285+373391(Top 13%)175(Top 2%)175(Top 4%)
30K18.64 mi3.11 mi4150+333245+40245+403089(Top 12%)172(Top 2%)172(Top 4%)
20M20.00 mi1.36 mi4022+128237+8237+82973(Top 11%)177(Top 2%)177(Top 4%)
21M21.00 mi1.00 mi3877+145224+13224+132653(Top 10%)158(Top 1%)158(Top 3%)
35K21.75 mi0.75 mi3828+49222+2222+23156(Top 12%)203(Top 2%)203(Top 4%)
23M23.00 mi1.25 mi3662+166204+18204+182297(Top 9%)135(Top 1%)135(Top 3%)
24M24.00 mi1.00 mi3576+86196+8196+82603(Top 10%)176(Top 2%)176(Top 4%)
40K24.85 mi0.85 mi3509+67192+4192+42783(Top 10%)218(Top 2%)218(Top 4%)
25.2M25.20 mi0.35 mi3486+23193-1193-13252(Top 12%)282(Top 2%)282(Top 6%)
Finish26.22 mi1.02 mi3400+861931932397(Top 9%)183(Top 2%)183(Top 4%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 18%
×21story building
+97ft-345ft

Overall

4892

Females

335

F18-39

335

5K→10K

3.1 - 6.2 mi

Top 18%
×5story building
+79ft-138ft

Overall

4922

Females

349

F18-39

349

10K→15K

6.2 - 9.3 mi

Top 18%
×3story building
+67ft-78ft

Overall

4892

Females

335

F18-39

335

15K→20K

9.3 - 12.4 mi

Top 16%
×5story building
+106ft-86ft

Overall

4187

Females

261

F18-39

261

20K→Half

12.4 - 13.1 mi

Top 14%
×2story building
+19ft-37ft

Overall

3678

Females

197

F18-39

197

Half→25K

13.1 - 15.5 mi

Top 13%
×4story building
+66ft-88ft

Overall

3391

Females

175

F18-39

175

25K→30K

15.5 - 18.6 mi

Top 12%
×9story building
+181ft-148ft

Overall

3089

Females

172

F18-39

172

30K→20M

18.6 - 20.0 mi

Top 11%
×5story building
+64ft-50ft

Overall

2973

Females

177

F18-39

177

20M→21M

20.0 - 21.0 mi

Top 10%
×8story building
+106ft-24ft

Overall

2653

Females

158

F18-39

158

21M→35K

21.0 - 21.8 mi

Top 12%
×7story building
+17ft-86ft

Overall

3156

Females

203

F18-39

203

35K→23M

21.8 - 23.0 mi

Top 9%
×5story building
+23ft-63ft

Overall

2297

Females

135

F18-39

135

23M→24M

23.0 - 24.0 mi

Top 10%
×6story building
+12ft-82ft

Overall

2603

Females

176

F18-39

176

24M→40K

24.0 - 24.9 mi

Top 10%
×1story
+6ft-20ft

Overall

2783

Females

218

F18-39

218

40K→25.2M

24.9 - 25.2 mi

Top 12%
×1story
+13ft-16ft

Overall

3252

Females

282

F18-39

282

25.2M→Finish

25.2 - 26.2 mi

Top 9%
×2story building
+22ft-21ft

Overall

2397

Females

183

F18-39

183

Passing Analysis

Category:
Athletes Passed
2411
Passed By
250
Net Change
+2161
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#5561
5K → 10K42479+345#5561#5216
10K → 15K17358+115#5216#5101
15K → 20K26119+242#5101#4859
20K → Half793+76#4859#4783
Half → 25K3055+300#4783#4483
25K → 30K3418+333#4483#4150
30K → 20M1324+128#4150#4022
20M → 21M15813+145#4022#3877
21M → 35K589+49#3877#3828
35K → 23M1759+166#3828#3662
23M → 24M9812+86#3662#3576
24M → 40K769+67#3576#3509
40K → 25.2M296+23#3509#3486
25.2M → Finish10216+86#3486#3400
TOTALS2411250+2161
📊

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