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BOSTON MARATHON 2023

Samantha Caldwell

Bib: 14915•F

CA

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

Start
0:00:00
Race begins
5K· 3.11 mi
29:01
Rank: #21653
Start → 5K
29:01 | 9:20/mi
10K· 6.21 mi
58:07
Rank: #21890 (-237)
5K → 10K
29:06 | 9:22/mi
15K· 9.32 mi
1:26:01
Rank: #21463 (+427)
10K → 15K
27:54 | 8:59/mi
20K· 12.43 mi
1:54:06
Rank: #21120 (+343)
15K → 20K
28:05 | 9:02/mi
Half· 13.11 mi
2:00:07
Rank: #21042 (+78)
20K → Half
6:01 | 8:49/mi
25K· 15.53 mi
2:22:01
Rank: #20729 (+313)
Half → 25K
21:54 | 9:02/mi
30K· 18.64 mi
2:50:37
Rank: #20289 (+440)
25K → 30K
28:36 | 9:12/mi
20M
3:03:03
Rank: #20060 (+229)
30K → 20M
12:26 | 9:09/mi
21M
3:12:54
Rank: #19880 (+180)
20M → 21M
9:51 | 9:51/mi
35K· 21.75 mi
3:19:45
Rank: #19826 (+54)
21M → 35K
6:51 | 9:09/mi
23M
3:31:17
Rank: #19686 (+140)
35K → 23M
11:32 | 9:13/mi
24M
3:40:14
Rank: #19573 (+113)
23M → 24M
8:57 | 8:57/mi
40K· 24.85 mi
3:47:55
Rank: #19458 (+115)
24M → 40K
7:41 | 8:59/mi
25.2M
3:51:10
Rank: #19404 (+54)
40K → 25.2M
3:15 | 9:25/mi
Finish· 26.22 mi
3:59:34
Rank: #19241 (+163)
25.2M → Finish
8:24 | 8:15/mi

The Course

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Half Splits

1st Half· via Half⚖️ Balanced
Distance13.11 mi
Time2:00:07
Pace9:10 /mi
2nd Half⚖️ Balanced
Distance13.11 mi
Time1:59:27
Pace9:07 /mi
📊Even Split: Consistent pacing between halves

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:59:1729:019:2029:01
9:20
-
10K
6.21 mi11:28:2358:079:2129:06
9:22
+0:02
15K
9.32 mi11:56:171:26:019:1427:54
8:59
-0:23
20K
12.43 mi12:24:221:54:069:1128:05
9:02
+0:03
Half
13.11 mi12:30:232:00:079:106:01
8:49
-0:13
25K
15.53 mi12:52:172:22:019:0921:54
9:02
+0:13
30K
18.64 mi13:20:532:50:379:0928:36
9:12
+0:10
20M
20.00 mi13:33:193:03:039:0912:26
9:09
-0:03
21M
21.00 mi13:43:103:12:549:119:51
9:51
+0:42
35K
21.75 mi13:50:013:19:459:116:51
9:09
-0:42
23M
23.00 mi14:01:333:31:179:1111:32
9:13
+0:04
24M
24.00 mi14:10:303:40:149:118:57
8:57
-0:16
40K
24.85 mi14:18:113:47:559:107:41
8:59
+0:02
25.2M
25.20 mi14:21:263:51:109:103:15
9:25
+0:26
Finish
26.22 mi14:29:503:59:349:098:24
8:15
-1:10

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

8:15 /mi

Average Pace

9:09 /mi

Slowest Pace

9:51 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:48:56

45% of race

Time at Steady Pace

2:00:47

50% of race

Time at Slower Pace

9:51

4% of race

Average Pace: 9:08 /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 mi10:59:1729:019:2029:01
9:20
#21653
10K
6.21 mi11:28:2358:079:2129:06
9:22
#21890
15K
9.32 mi11:56:171:26:019:1427:54
8:59
#21463
20K
12.43 mi12:24:221:54:069:1128:05
9:02
#21120
Half
13.11 mi12:30:232:00:079:106:01
8:49
#21042
25K
15.53 mi12:52:172:22:019:0921:54
9:02
#20729
30K
18.64 mi13:20:532:50:379:0928:36
9:12
#20289
20M
20.00 mi13:33:193:03:039:0912:26
9:09
#20060
21M
21.00 mi13:43:103:12:549:119:51
9:51
#19880
35K
21.75 mi13:50:013:19:459:116:51
9:09
#19826
23M
23.00 mi14:01:333:31:179:1111:32
9:13
#19686
24M
24.00 mi14:10:303:40:149:118:57
8:57
#19573
40K
24.85 mi14:18:113:47:559:107:41
8:59
#19458
25.2M
25.20 mi14:21:263:51:109:103:15
9:25
#19404
Finish
26.22 mi14:29:503:59:349:098:24
8:15
#19241
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi216538717871720415(Top 77%)7906(Top 69%)7906(Top 162%)
10K6.21 mi3.10 mi21890-2378786-698786-6922127(Top 83%)8885(Top 78%)8885(Top 182%)
15K9.32 mi3.11 mi21463+4278534+2528534+25220415(Top 77%)7906(Top 69%)7906(Top 162%)
20K12.43 mi3.11 mi21120+3438341+1938341+19319882(Top 75%)7612(Top 67%)7612(Top 156%)
Half13.11 mi0.68 mi21042+788292+498292+4919622(Top 74%)7450(Top 65%)7450(Top 153%)
25K15.53 mi2.42 mi20729+3138111+1818111+18119144(Top 72%)7214(Top 63%)7214(Top 148%)
30K18.64 mi3.11 mi20289+4407892+2197892+21918204(Top 68%)6769(Top 59%)6769(Top 139%)
20M20.00 mi1.36 mi20060+2297779+1137779+11317332(Top 65%)6359(Top 56%)6359(Top 130%)
21M21.00 mi1.00 mi19880+1807670+1097670+10917472(Top 66%)6474(Top 57%)6474(Top 133%)
35K21.75 mi0.75 mi19826+547649+217649+2118600(Top 70%)7169(Top 63%)7169(Top 147%)
23M23.00 mi1.25 mi19686+1407578+717578+7117147(Top 64%)6376(Top 56%)6376(Top 131%)
24M24.00 mi1.00 mi19573+1137524+547524+5417031(Top 64%)6381(Top 56%)6381(Top 131%)
40K24.85 mi0.85 mi19458+1157467+577467+5716107(Top 61%)5927(Top 52%)5927(Top 121%)
25.2M25.20 mi0.35 mi19404+547431+367431+3614934(Top 56%)5292(Top 46%)5292(Top 108%)
Finish26.22 mi1.02 mi19241+1637348+837348+8313780(Top 52%)4639(Top 41%)4639(Top 95%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 77%
×21stories
+97ft-345ft

Overall

20415

Females

7906

F18-39

7906

5K→10K

3.1 - 6.2 mi

Top 83%
×5stories
+79ft-138ft

Overall

22127

Females

8885

F18-39

8885

10K→15K

6.2 - 9.3 mi

Top 77%
×3stories
+67ft-78ft

Overall

20415

Females

7906

F18-39

7906

15K→20K

9.3 - 12.4 mi

Top 75%
×5stories
+106ft-86ft

Overall

19882

Females

7612

F18-39

7612

20K→Half

12.4 - 13.1 mi

Top 74%
×2stories
+19ft-37ft

Overall

19622

Females

7450

F18-39

7450

Half→25K

13.1 - 15.5 mi

Top 72%
×4stories
+66ft-88ft

Overall

19144

Females

7214

F18-39

7214

25K→30K

15.5 - 18.6 mi

Top 68%
×9stories
+181ft-148ft

Overall

18204

Females

6769

F18-39

6769

30K→20M

18.6 - 20.0 mi

Top 65%
×5stories
+64ft-50ft

Overall

17332

Females

6359

F18-39

6359

20M→21M

20.0 - 21.0 mi

Top 66%
×8stories
+106ft-24ft

Overall

17472

Females

6474

F18-39

6474

21M→35K

21.0 - 21.8 mi

Top 70%
×7stories
+17ft-86ft

Overall

18600

Females

7169

F18-39

7169

35K→23M

21.8 - 23.0 mi

Top 64%
×5stories
+23ft-63ft

Overall

17147

Females

6376

F18-39

6376

23M→24M

23.0 - 24.0 mi

Top 64%
×6stories
+12ft-82ft

Overall

17031

Females

6381

F18-39

6381

24M→40K

24.0 - 24.9 mi

Top 61%
×1story
+6ft-20ft

Overall

16107

Females

5927

F18-39

5927

40K→25.2M

24.9 - 25.2 mi

Top 56%
×1story
+13ft-16ft

Overall

14934

Females

5292

F18-39

5292

25.2M→Finish

25.2 - 26.2 mi

Top 52%
×2stories
+22ft-21ft

Overall

13780

Females

4639

F18-39

4639

Passing Analysis

Category:
Athletes Passed
2953
Passed By
541
Net Change
+2412
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#21653
5K → 10K169406-237#21653#21890
10K → 15K45831+427#21890#21463
15K → 20K36724+343#21463#21120
20K → Half824+78#21120#21042
Half → 25K3218+313#21042#20729
25K → 30K4433+440#20729#20289
30K → 20M2356+229#20289#20060
20M → 21M19313+180#20060#19880
21M → 35K7016+54#19880#19826
35K → 23M15313+140#19826#19686
23M → 24M1229+113#19686#19573
24M → 40K1183+115#19573#19458
40K → 25.2M551+54#19458#19404
25.2M → Finish1674+163#19404#19241
TOTALS2953541+2412
📊

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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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing