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BOSTON MARATHON 2023

Samantha Burch

Bib: 29918•F

NJ

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
28:18
Rank: #20908
Start → 5K
28:18 | 9:07/mi
10K· 6.21 mi
56:08
Rank: #20787 (+121)
5K → 10K
27:50 | 8:58/mi
15K· 9.32 mi
1:23:52
Rank: #20565 (+222)
10K → 15K
27:44 | 8:56/mi
20K· 12.43 mi
1:51:51
Rank: #20371 (+194)
15K → 20K
27:59 | 9:00/mi
Half· 13.11 mi
1:58:02
Rank: #20385 (-14)
20K → Half
6:11 | 9:04/mi
25K· 15.53 mi
2:20:55
Rank: #20445 (-60)
Half → 25K
22:53 | 9:26/mi
30K· 18.64 mi
2:53:05
Rank: #20775 (-330)
25K → 30K
32:10 | 10:21/mi
20M
3:07:17
Rank: #20846 (-71)
30K → 20M
14:12 | 10:27/mi
21M
3:18:22
Rank: #20837 (+9)
20M → 21M
11:05 | 11:05/mi
35K· 21.75 mi
3:25:51
Rank: #20848 (-11)
21M → 35K
7:29 | 10:00/mi
23M
3:40:05
Rank: #21026 (-178)
35K → 23M
14:14 | 11:22/mi
24M
3:50:07
Rank: #21010 (+16)
23M → 24M
10:02 | 10:02/mi
40K· 24.85 mi
3:58:48
Rank: #20970 (+40)
24M → 40K
8:41 | 10:09/mi
25.2M
4:02:57
Rank: #21017 (-47)
40K → 25.2M
4:09 | 12:02/mi
Finish· 26.22 mi
4:12:24
Rank: #20933 (+84)
25.2M → Finish
9:27 | 9:16/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:58:02
Pace9:00 /mi
2nd Half
Distance13.11 mi
Time2:14:22
Pace10:15 /mi
📊Positive Split: 13.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:51:0428:189:0728:18
9:07
-
10K
6.21 mi12:18:5456:089:0227:50
8:58
-0:09
15K
9.32 mi12:46:381:23:529:0027:44
8:56
-0:02
20K
12.43 mi13:14:371:51:519:0027:59
9:00
+0:04
Half
13.11 mi13:20:481:58:029:006:11
9:04
+0:04
25K
15.53 mi13:43:412:20:559:0422:53
9:26
+0:22
30K
18.64 mi14:15:512:53:059:1732:10
10:21
+0:55
20M
20.00 mi14:30:033:07:179:2214:12
10:27
+0:06
21M
21.00 mi14:41:083:18:229:2711:05
11:05
+0:38
35K
21.75 mi14:48:373:25:519:287:29
10:00
-1:05
23M
23.00 mi15:02:513:40:059:3414:14
11:22
+1:22
24M
24.00 mi15:12:533:50:079:3510:02
10:02
-1:20
40K
24.85 mi15:21:343:58:489:368:41
10:09
+0:07
25.2M
25.20 mi15:25:434:02:579:384:09
12:02
+1:53
Finish
26.22 mi15:35:104:12:249:389:27
9:16
-2:46

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

8:56 /mi

Average Pace

9:38 /mi

Slowest Pace

12:02 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:30:22

60% of race

Time at Steady Pace

1:12:34

29% of race

Time at Slower Pace

29:28

12% of race

Average Pace: 9:38 /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 mi11:51:0428:189:0728:18
9:07
#20908
10K
6.21 mi12:18:5456:089:0227:50
8:58
#20787
15K
9.32 mi12:46:381:23:529:0027:44
8:56
#20565
20K
12.43 mi13:14:371:51:519:0027:59
9:00
#20371
Half
13.11 mi13:20:481:58:029:006:11
9:04
#20385
25K
15.53 mi13:43:412:20:559:0422:53
9:26
#20445
30K
18.64 mi14:15:512:53:059:1732:10
10:21
#20775
20M
20.00 mi14:30:033:07:179:2214:12
10:27
#20846
21M
21.00 mi14:41:083:18:229:2711:05
11:05
#20837
35K
21.75 mi14:48:373:25:519:287:29
10:00
#20848
23M
23.00 mi15:02:513:40:059:3414:14
11:22
#21026
24M
24.00 mi15:12:533:50:079:3510:02
10:02
#21010
40K
24.85 mi15:21:343:58:489:368:41
10:09
#20970
25.2M
25.20 mi15:25:434:02:579:384:09
12:02
#21017
Finish
26.22 mi15:35:104:12:249:389:27
9:16
#20933
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi209088325832520174(Top 76%)7767(Top 68%)7767(Top 159%)
10K6.21 mi3.10 mi20787+1218192+1338192+13320720(Top 78%)8104(Top 71%)8104(Top 166%)
15K9.32 mi3.11 mi20565+2228057+1358057+13520174(Top 76%)7767(Top 68%)7767(Top 159%)
20K12.43 mi3.11 mi20371+1947928+1297928+12919747(Top 74%)7526(Top 66%)7526(Top 154%)
Half13.11 mi0.68 mi20385-147935-77935-720731(Top 78%)8093(Top 71%)8093(Top 166%)
25K15.53 mi2.42 mi20445-607951-167951-1620637(Top 78%)8069(Top 71%)8069(Top 165%)
30K18.64 mi3.11 mi20775-3308147-1968147-19621894(Top 82%)8844(Top 77%)8844(Top 181%)
20M20.00 mi1.36 mi20846-718205-588205-5821619(Top 81%)8762(Top 77%)8762(Top 179%)
21M21.00 mi1.00 mi20837+98217-128217-1221003(Top 79%)8462(Top 74%)8462(Top 173%)
35K21.75 mi0.75 mi20848-118237-208237-2021287(Top 80%)8644(Top 76%)8644(Top 177%)
23M23.00 mi1.25 mi21026-1788344-1078344-10723011(Top 86%)9590(Top 84%)9590(Top 196%)
24M24.00 mi1.00 mi21010+168349-58349-520888(Top 78%)8483(Top 74%)8483(Top 174%)
40K24.85 mi0.85 mi20970+408338+118338+1120395(Top 77%)8276(Top 72%)8276(Top 169%)
25.2M25.20 mi0.35 mi21017-478374-368374-3622573(Top 85%)9433(Top 83%)9433(Top 193%)
Finish26.22 mi1.02 mi20933+848334+408334+4019281(Top 72%)7606(Top 67%)7606(Top 156%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 76%
×21stories
+97ft-345ft

Overall

20174

Females

7767

F18-39

7767

5K→10K

3.1 - 6.2 mi

Top 78%
×5stories
+79ft-138ft

Overall

20720

Females

8104

F18-39

8104

10K→15K

6.2 - 9.3 mi

Top 76%
×3stories
+67ft-78ft

Overall

20174

Females

7767

F18-39

7767

15K→20K

9.3 - 12.4 mi

Top 74%
×5stories
+106ft-86ft

Overall

19747

Females

7526

F18-39

7526

20K→Half

12.4 - 13.1 mi

Top 78%
×2stories
+19ft-37ft

Overall

20731

Females

8093

F18-39

8093

Half→25K

13.1 - 15.5 mi

Top 78%
×4stories
+66ft-88ft

Overall

20637

Females

8069

F18-39

8069

25K→30K

15.5 - 18.6 mi

Top 82%
×9stories
+181ft-148ft

Overall

21894

Females

8844

F18-39

8844

30K→20M

18.6 - 20.0 mi

Top 81%
×5stories
+64ft-50ft

Overall

21619

Females

8762

F18-39

8762

20M→21M

20.0 - 21.0 mi

Top 79%
×8stories
+106ft-24ft

Overall

21003

Females

8462

F18-39

8462

21M→35K

21.0 - 21.8 mi

Top 80%
×7stories
+17ft-86ft

Overall

21287

Females

8644

F18-39

8644

35K→23M

21.8 - 23.0 mi

Top 86%
×5stories
+23ft-63ft

Overall

23011

Females

9590

F18-39

9590

23M→24M

23.0 - 24.0 mi

Top 78%
×6stories
+12ft-82ft

Overall

20888

Females

8483

F18-39

8483

24M→40K

24.0 - 24.9 mi

Top 77%
×1story
+6ft-20ft

Overall

20395

Females

8276

F18-39

8276

40K→25.2M

24.9 - 25.2 mi

Top 85%
×1story
+13ft-16ft

Overall

22573

Females

9433

F18-39

9433

25.2M→Finish

25.2 - 26.2 mi

Top 72%
×2stories
+22ft-21ft

Overall

19281

Females

7606

F18-39

7606

Passing Analysis

Category:
Athletes Passed
1497
Passed By
1522
Net Change
-25
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#20908
5K → 10K366245+121#20908#20787
10K → 15K30987+222#20787#20565
15K → 20K26066+194#20565#20371
20K → Half2135-14#20371#20385
Half → 25K83143-60#20385#20445
25K → 30K65395-330#20445#20775
30K → 20M57128-71#20775#20846
20M → 21M6253+9#20846#20837
21M → 35K3445-11#20837#20848
35K → 23M34212-178#20848#21026
23M → 24M4933+16#21026#21010
24M → 40K5414+40#21010#20970
40K → 25.2M1158-47#20970#21017
25.2M → Finish928+84#21017#20933
TOTALS14971522-25
📊

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