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BOSTON MARATHON 2025

Jenn Chadwick

Bib: 23042•F

VA

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Top 40%
Masters (Masters Women)
#0 / 6759
Top 26%
Division (F50-54)
#0 / 1303
Top 17%
Race Day Weather
50°/40°F
broken clouds

⏱️ 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
8:06/mi
25:10
↑ 97↓ 3451.5%
10K· 6.21 mi
8:00/mi
50:01
↑ 79↓ 1380.4%
15K· 9.32 mi
7:57/mi
1:14:43
↑ 67↓ 78
20K· 12.43 mi
7:57/mi
1:39:26
↑ 106↓ 860.1%
Half· 13.11 mi
7:53/mi
1:44:49
↑ 19↓ 370.5%
25K· 15.53 mi
8:21/mi
2:05:03
↑ 66↓ 880.2%
30K· 18.64 mi
8:43/mi
2:32:07
↑ 181↓ 1480.2%
20M
8:38/mi
2:43:51
↑ 64↓ 500.2%
21M
9:48/mi
2:53:39
↑ 106↓ 241.6%
35K· 21.75 mi
7:59/mi
2:59:37
↑ 17↓ 861.7%
23M
8:18/mi
3:10:00
↑ 23↓ 630.6%
24M
8:07/mi
3:18:07
↓ 821.3%
40K· 24.85 mi
8:33/mi
3:25:26
↓ 200.3%
25.2M
9:40/mi
3:28:46
↑ 13↓ 160.2%
Finish· 26.22 mi
8:03/mi
3:36:58
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:44:49
Pace8:00 /mi
2nd Half
Distance13.11 mi
Time1:52:09
Pace8:33 /mi
📊Positive Split: 7.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:22:0325:108:0625:10
8:06
-
10K
6.21 mi11:46:5450:018:0324:51
8:00
-0:06
15K
9.32 mi12:11:361:14:438:0124:42
7:57
-0:03
20K
12.43 mi12:36:191:39:268:0024:43
7:57
0:00
Half
13.11 mi12:41:421:44:498:005:23
7:53
-0:04
25K
15.53 mi13:01:562:05:038:0320:14
8:21
+0:28
30K
18.64 mi13:29:002:32:078:1027:04
8:43
+0:22
20M
20.00 mi13:40:442:43:518:1211:44
8:38
-0:05
21M
21.00 mi13:50:322:53:398:169:48
9:48
+1:10
35K
21.75 mi13:56:302:59:378:165:58
7:59
-1:49
23M
23.00 mi14:06:533:10:008:1610:23
8:18
+0:19
24M
24.00 mi14:15:003:18:078:158:07
8:07
-0:11
40K
24.85 mi14:22:193:25:268:167:19
8:33
+0:26
25.2M
25.20 mi14:25:393:28:468:173:20
9:40
+1:07
Finish
26.22 mi14:33:513:36:588:178:12
8:03
-1:37

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

7:53 /mi

Average Pace

8:17 /mi

Slowest Pace

9:48 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

0:00

0% of race

Time at Steady Pace

2:37:43

73% of race

Time at Slower Pace

59:15

27% of race

Average Pace: 8:16 /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 mi11:22:0325:108:0625:10
8:06
#17352
10K
6.21 mi11:46:5450:018:0324:51
8:00
#16902
15K
9.32 mi12:11:361:14:438:0124:42
7:57
#16462
20K
12.43 mi12:36:191:39:268:0024:43
7:57
#15936
Half
13.11 mi12:41:421:44:498:005:23
7:53
#15887
25K
15.53 mi13:01:562:05:038:0320:14
8:21
#15948
30K
18.64 mi13:29:002:32:078:1027:04
8:43
#15943
20M
20.00 mi13:40:442:43:518:1211:44
8:38
#15809
21M
21.00 mi13:50:322:53:398:169:48
9:48
#15873
35K
21.75 mi13:56:302:59:378:165:58
7:59
#15714
23M
23.00 mi14:06:533:10:008:1610:23
8:18
#15460
24M
24.00 mi14:15:003:18:078:158:07
8:07
#15285
40K
24.85 mi14:22:193:25:268:167:19
8:33
#15207
25.2M
25.20 mi14:25:393:28:468:173:20
9:40
#15217
Finish
26.22 mi14:33:513:36:588:178:12
8:03
#15100
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF50-54Seg. OverallSeg. FemalesSeg. F50-54
5K3.11 mi3.11 mi173525941594115675(Top 55%)4954(Top 41%)4954(Top 380%)
10K6.21 mi3.10 mi16902+4505664+2775664+27716483(Top 58%)5413(Top 44%)5413(Top 415%)
15K9.32 mi3.11 mi16462+4405414+2505414+25015675(Top 55%)4954(Top 41%)4954(Top 380%)
20K12.43 mi3.11 mi15936+5265109+3055109+30514597(Top 51%)4430(Top 36%)4430(Top 340%)
Half13.11 mi0.68 mi15887+495085+245085+2415088(Top 53%)4671(Top 38%)4671(Top 358%)
25K15.53 mi2.42 mi15948-615133-485133-4816214(Top 57%)5429(Top 44%)5429(Top 417%)
30K18.64 mi3.11 mi15943+55189-565189-5616069(Top 57%)5500(Top 45%)5500(Top 422%)
20M20.00 mi1.36 mi15809+1345156+335156+3314654(Top 52%)4853(Top 40%)4853(Top 372%)
21M21.00 mi1.00 mi15873-645235-795235-7917484(Top 62%)6520(Top 53%)6520(Top 500%)
35K21.75 mi0.75 mi15714+1595165+705165+7012176(Top 43%)3750(Top 31%)3750(Top 288%)
23M23.00 mi1.25 mi15460+2545049+1165049+11612032(Top 42%)3766(Top 31%)3766(Top 289%)
24M24.00 mi1.00 mi15285+1754969+804969+8012068(Top 42%)3847(Top 31%)3847(Top 295%)
40K24.85 mi0.85 mi15207+784964+54964+513817(Top 49%)4865(Top 40%)4865(Top 373%)
25.2M25.20 mi0.35 mi15217-104980-164980-1615483(Top 55%)5807(Top 47%)5807(Top 446%)
Finish26.22 mi1.02 mi15100+1174931+494931+4913230(Top 47%)4570(Top 37%)4570(Top 351%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 55%
×21story building
+97ft-345ft

Overall

15675

Females

4954

F50-54

4954

5K→10K

3.1 - 6.2 mi

Top 58%
×5story building
+79ft-138ft

Overall

16483

Females

5413

F50-54

5413

10K→15K

6.2 - 9.3 mi

Top 55%
×3story building
+67ft-78ft

Overall

15675

Females

4954

F50-54

4954

15K→20K

9.3 - 12.4 mi

Top 51%
×5story building
+106ft-86ft

Overall

14597

Females

4430

F50-54

4430

20K→Half

12.4 - 13.1 mi

Top 53%
×2story building
+19ft-37ft

Overall

15088

Females

4671

F50-54

4671

Half→25K

13.1 - 15.5 mi

Top 57%
×4story building
+66ft-88ft

Overall

16214

Females

5429

F50-54

5429

25K→30K

15.5 - 18.6 mi

Top 57%
×9story building
+181ft-148ft

Overall

16069

Females

5500

F50-54

5500

30K→20M

18.6 - 20.0 mi

Top 52%
×5story building
+64ft-50ft

Overall

14654

Females

4853

F50-54

4853

20M→21M

20.0 - 21.0 mi

Top 62%
×8story building
+106ft-24ft

Overall

17484

Females

6520

F50-54

6520

21M→35K

21.0 - 21.8 mi

Top 43%
×7story building
+17ft-86ft

Overall

12176

Females

3750

F50-54

3750

35K→23M

21.8 - 23.0 mi

Top 42%
×5story building
+23ft-63ft

Overall

12032

Females

3766

F50-54

3766

23M→24M

23.0 - 24.0 mi

Top 42%
×6story building
+12ft-82ft

Overall

12068

Females

3847

F50-54

3847

24M→40K

24.0 - 24.9 mi

Top 49%
×1story
+6ft-20ft

Overall

13817

Females

4865

F50-54

4865

40K→25.2M

24.9 - 25.2 mi

Top 55%
×1story
+13ft-16ft

Overall

15483

Females

5807

F50-54

5807

25.2M→Finish

25.2 - 26.2 mi

Top 47%
×2story building
+22ft-21ft

Overall

13230

Females

4570

F50-54

4570

Passing Analysis

Category:
Athletes Passed
3198
Passed By
946
Net Change
+2252
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#17352
5K → 10K573123+450#17352#16902
10K → 15K47838+440#16902#16462
15K → 20K54923+526#16462#15936
20K → Half6213+49#15936#15887
Half → 25K149210-61#15887#15948
25K → 30K235230+5#15948#15943
30K → 20M18349+134#15943#15809
20M → 21M92156-64#15809#15873
21M → 35K1656+159#15873#15714
35K → 23M2617+254#15714#15460
23M → 24M1816+175#15460#15285
24M → 40K10527+78#15285#15207
40K → 25.2M2939-10#15207#15217
25.2M → Finish13619+117#15217#15100
TOTALS3198946+2252
📊

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