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BOSTON MARATHON 2025

Leah Chohon

Bib: 12959•F

NE

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 35%
Gender (Female)
#0 / 12228
Top 18%
Division (F18-39)
#0 / 5469
Top 31%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
22:29
Rank: #9812
Start → 5K
22:29 | 7:14/mi
10K· 6.21 mi
45:04
Rank: #9927 (-115)
5K → 10K
22:35 | 7:16/mi
15K· 9.32 mi
1:07:30
Rank: #9686 (+241)
10K → 15K
22:26 | 7:13/mi
20K· 12.43 mi
1:30:26
Rank: #9668 (+18)
15K → 20K
22:56 | 7:23/mi
Half· 13.11 mi
1:35:26
Rank: #9699 (-31)
20K → Half
5:00 | 7:20/mi
25K· 15.53 mi
1:53:48
Rank: #9786 (-87)
Half → 25K
18:22 | 7:35/mi
30K· 18.64 mi
2:18:20
Rank: #9885 (-99)
25K → 30K
24:32 | 7:54/mi
20M
2:29:18
Rank: #9918 (-33)
30K → 20M
10:58 | 8:04/mi
21M
2:37:45
Rank: #9904 (+14)
20M → 21M
8:27 | 8:27/mi
35K· 21.75 mi
2:43:22
Rank: #9844 (+60)
21M → 35K
5:37 | 7:30/mi
23M
2:53:24
Rank: #9842 (+2)
35K → 23M
10:02 | 8:01/mi
24M
3:01:22
Rank: #9855 (-13)
23M → 24M
7:58 | 7:58/mi
40K· 24.85 mi
3:08:15
Rank: #9863 (-8)
24M → 40K
6:53 | 8:03/mi
25.2M
3:11:17
Rank: #9860 (+3)
40K → 25.2M
3:02 | 8:48/mi
Finish· 26.22 mi
3:19:08
Rank: #9869 (-9)
25.2M → Finish
7:51 | 7:42/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:35:26
Pace7:17 /mi
2nd Half
Distance13.11 mi
Time1:43:42
Pace7:55 /mi
📊Positive Split: 8.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:51:0722:297:1422:29
7:14
-
10K
6.21 mi11:13:4245:047:1522:35
7:16
+0:02
15K
9.32 mi11:36:081:07:307:1522:26
7:13
-0:03
20K
12.43 mi11:59:041:30:267:1722:56
7:23
+0:10
Half
13.11 mi12:04:041:35:267:175:00
7:20
-0:03
25K
15.53 mi12:22:261:53:487:2018:22
7:35
+0:15
30K
18.64 mi12:46:582:18:207:2524:32
7:54
+0:19
20M
20.00 mi12:57:562:29:187:2810:58
8:04
+0:10
21M
21.00 mi13:06:232:37:457:318:27
8:27
+0:23
35K
21.75 mi13:12:002:43:227:315:37
7:30
-0:57
23M
23.00 mi13:22:022:53:247:3210:02
8:01
+0:31
24M
24.00 mi13:30:003:01:227:337:58
7:58
-0:03
40K
24.85 mi13:36:533:08:157:346:53
8:03
+0:05
25.2M
25.20 mi13:39:553:11:177:353:02
8:48
+0:45
Finish
26.22 mi13:47:463:19:087:367:51
7:42
-1:06

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

7:13 /mi

Average Pace

7:36 /mi

Slowest Pace

8:48 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:35:26

48% of race

Time at Steady Pace

56:22

28% of race

Time at Slower Pace

47:20

24% of race

Average Pace: 7:36 /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 mi10:51:0722:297:1422:29
7:14
#9812
10K
6.21 mi11:13:4245:047:1522:35
7:16
#9927
15K
9.32 mi11:36:081:07:307:1522:26
7:13
#9686
20K
12.43 mi11:59:041:30:267:1722:56
7:23
#9668
Half
13.11 mi12:04:041:35:267:175:00
7:20
#9699
25K
15.53 mi12:22:261:53:487:2018:22
7:35
#9786
30K
18.64 mi12:46:582:18:207:2524:32
7:54
#9885
20M
20.00 mi12:57:562:29:187:2810:58
8:04
#9918
21M
21.00 mi13:06:232:37:457:318:27
8:27
#9904
35K
21.75 mi13:12:002:43:227:315:37
7:30
#9844
23M
23.00 mi13:22:022:53:247:3210:02
8:01
#9842
24M
24.00 mi13:30:003:01:227:337:58
7:58
#9855
40K
24.85 mi13:36:533:08:157:346:53
8:03
#9863
25.2M
25.20 mi13:39:553:11:177:353:02
8:48
#9860
Finish
26.22 mi13:47:463:19:087:367:51
7:42
#9869
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi9812172517259312(Top 33%)1571(Top 13%)1571(Top 29%)
10K6.21 mi3.10 mi9927-1151770-451770-4510109(Top 36%)1877(Top 15%)1877(Top 34%)
15K9.32 mi3.11 mi9686+2411690+801690+809312(Top 33%)1571(Top 13%)1571(Top 29%)
20K12.43 mi3.11 mi9668+181722-321722-329755(Top 34%)1853(Top 15%)1853(Top 34%)
Half13.11 mi0.68 mi9699-311732-101732-1010330(Top 36%)2110(Top 17%)2110(Top 39%)
25K15.53 mi2.42 mi9786-871804-721804-7210560(Top 37%)2351(Top 19%)2351(Top 43%)
30K18.64 mi3.11 mi9885-991901-971901-9710608(Top 37%)2597(Top 21%)2597(Top 47%)
20M20.00 mi1.36 mi9918-331952-511952-5110900(Top 38%)2887(Top 24%)2887(Top 53%)
21M21.00 mi1.00 mi9904+141980-281980-2810170(Top 36%)2685(Top 22%)2685(Top 49%)
35K21.75 mi0.75 mi9844+601981-11981-18722(Top 31%)2001(Top 16%)2001(Top 37%)
23M23.00 mi1.25 mi9842+22033-522033-5210133(Top 36%)2800(Top 23%)2800(Top 51%)
24M24.00 mi1.00 mi9855-132066-332066-3311013(Top 39%)3303(Top 27%)3303(Top 60%)
40K24.85 mi0.85 mi9863-82116-502116-5010570(Top 37%)3194(Top 26%)3194(Top 58%)
25.2M25.20 mi0.35 mi9860+32131-152131-1510641(Top 37%)3297(Top 27%)3297(Top 60%)
Finish26.22 mi1.02 mi9869-92158-272158-2710734(Top 38%)3328(Top 27%)3328(Top 61%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 33%
×21stories
+97ft-345ft

Overall

9312

Females

1571

F18-39

1571

5K→10K

3.1 - 6.2 mi

Top 36%
×5stories
+79ft-138ft

Overall

10109

Females

1877

F18-39

1877

10K→15K

6.2 - 9.3 mi

Top 33%
×3stories
+67ft-78ft

Overall

9312

Females

1571

F18-39

1571

15K→20K

9.3 - 12.4 mi

Top 34%
×5stories
+106ft-86ft

Overall

9755

Females

1853

F18-39

1853

20K→Half

12.4 - 13.1 mi

Top 36%
×2stories
+19ft-37ft

Overall

10330

Females

2110

F18-39

2110

Half→25K

13.1 - 15.5 mi

Top 37%
×4stories
+66ft-88ft

Overall

10560

Females

2351

F18-39

2351

25K→30K

15.5 - 18.6 mi

Top 37%
×9stories
+181ft-148ft

Overall

10608

Females

2597

F18-39

2597

30K→20M

18.6 - 20.0 mi

Top 38%
×5stories
+64ft-50ft

Overall

10900

Females

2887

F18-39

2887

20M→21M

20.0 - 21.0 mi

Top 36%
×8stories
+106ft-24ft

Overall

10170

Females

2685

F18-39

2685

21M→35K

21.0 - 21.8 mi

Top 31%
×7stories
+17ft-86ft

Overall

8722

Females

2001

F18-39

2001

35K→23M

21.8 - 23.0 mi

Top 36%
×5stories
+23ft-63ft

Overall

10133

Females

2800

F18-39

2800

23M→24M

23.0 - 24.0 mi

Top 39%
×6stories
+12ft-82ft

Overall

11013

Females

3303

F18-39

3303

24M→40K

24.0 - 24.9 mi

Top 37%
×1story
+6ft-20ft

Overall

10570

Females

3194

F18-39

3194

40K→25.2M

24.9 - 25.2 mi

Top 37%
×1story
+13ft-16ft

Overall

10641

Females

3297

F18-39

3297

25.2M→Finish

25.2 - 26.2 mi

Top 38%
×2stories
+22ft-21ft

Overall

10734

Females

3328

F18-39

3328

Passing Analysis

Category:
Athletes Passed
1679
Passed By
1733
Net Change
-57
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#9812
5K → 10K173287-115#9812#9927
10K → 15K30867+241#9927#9686
15K → 20K191173+18#9686#9668
20K → Half2051-31#9668#9699
Half → 25K128215-87#9699#9786
25K → 30K194293-99#9786#9885
30K → 20M108140-33#9885#9918
20M → 21M10288+14#9918#9904
21M → 35K9131+60#9904#9844
35K → 23M107105+2#9844#9842
23M → 24M7891-13#9842#9855
24M → 40K7481-8#9855#9863
40K → 25.2M3330+3#9863#9860
25.2M → Finish7281-9#9860#9869
TOTALS16791733-57
📊

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