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BOSTON MARATHON 2025

Helen Chen

Bib: 23551•F

BC

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Masters (Masters Women)
#0 / 6759
Top 46%
Division (F55-59)
#0 / 994
Top 27%
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
8:33/mi
26:35
↑ 97↓ 3451.5%
10K· 6.21 mi
8:32/mi
53:05
↑ 79↓ 1380.4%
15K· 9.32 mi
8:21/mi
1:19:02
↑ 67↓ 78
20K· 12.43 mi
8:29/mi
1:45:22
↑ 106↓ 860.1%
Half· 13.11 mi
8:26/mi
1:51:07
↑ 19↓ 370.5%
25K· 15.53 mi
8:31/mi
2:11:46
↑ 66↓ 880.2%
30K· 18.64 mi
8:55/mi
2:39:27
↑ 181↓ 1480.2%
20M
9:13/mi
2:51:59
↑ 64↓ 500.2%
21M
9:46/mi
3:01:45
↑ 106↓ 241.6%
35K· 21.75 mi
8:44/mi
3:08:17
↑ 17↓ 861.7%
23M
9:15/mi
3:19:52
↑ 23↓ 630.6%
24M
9:02/mi
3:28:54
↓ 821.3%
40K· 24.85 mi
9:19/mi
3:36:52
↓ 200.3%
25.2M
10:41/mi
3:40:33
↑ 13↓ 160.2%
Finish· 26.22 mi
9:33/mi
3:50:17
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:51:07
Pace8:29 /mi
2nd Half
Distance13.11 mi
Time1:59:10
Pace9:05 /mi
📊Positive Split: 7.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:25:3026:358:3326:35
8:33
-
10K
6.21 mi11:52:0053:058:3326:30
8:32
-0:01
15K
9.32 mi12:17:571:19:028:2925:57
8:21
-0:11
20K
12.43 mi12:44:171:45:228:2926:20
8:29
+0:08
Half
13.11 mi12:50:021:51:078:295:45
8:26
-0:03
25K
15.53 mi13:10:412:11:468:2920:39
8:31
+0:05
30K
18.64 mi13:38:222:39:278:3327:41
8:55
+0:24
20M
20.00 mi13:50:542:51:598:3612:32
9:13
+0:18
21M
21.00 mi14:00:403:01:458:399:46
9:46
+0:33
35K
21.75 mi14:07:123:08:178:396:32
8:44
-1:02
23M
23.00 mi14:18:473:19:528:4111:35
9:15
+0:31
24M
24.00 mi14:27:493:28:548:429:02
9:02
-0:13
40K
24.85 mi14:35:473:36:528:447:58
9:19
+0:17
25.2M
25.20 mi14:39:283:40:338:453:41
10:41
+1:22
Finish
26.22 mi14:49:123:50:178:479:44
9:33
-1:08

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

8:21 /mi

Average Pace

8:47 /mi

Slowest Pace

10:41 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:11:46

57% of race

Time at Steady Pace

55:47

24% of race

Time at Slower Pace

42:44

19% of race

Average Pace: 8:47 /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 mi11:25:3026:358:3326:35
8:33
#20231
10K
6.21 mi11:52:0053:058:3326:30
8:32
#20095
15K
9.32 mi12:17:571:19:028:2925:57
8:21
#19536
20K
12.43 mi12:44:171:45:228:2926:20
8:29
#19136
Half
13.11 mi12:50:021:51:078:295:45
8:26
#19103
25K
15.53 mi13:10:412:11:468:2920:39
8:31
#18813
30K
18.64 mi13:38:222:39:278:3327:41
8:55
#18472
20M
20.00 mi13:50:542:51:598:3612:32
9:13
#18426
21M
21.00 mi14:00:403:01:458:399:46
9:46
#18331
35K
21.75 mi14:07:123:08:178:396:32
8:44
#18265
23M
23.00 mi14:18:473:19:528:4111:35
9:15
#18223
24M
24.00 mi14:27:493:28:548:429:02
9:02
#18182
40K
24.85 mi14:35:473:36:528:447:58
9:19
#18165
25.2M
25.20 mi14:39:283:40:338:453:41
10:41
#18213
Finish
26.22 mi14:49:123:50:178:479:44
9:33
#18383
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF55-59Seg. OverallSeg. FemalesSeg. F55-59
5K3.11 mi3.11 mi202317635763518406(Top 65%)6560(Top 54%)6560(Top 660%)
10K6.21 mi3.10 mi20095+1367529+1067529+10619978(Top 70%)7450(Top 61%)7450(Top 749%)
15K9.32 mi3.11 mi19536+5597195+3347195+33418406(Top 65%)6560(Top 54%)6560(Top 660%)
20K12.43 mi3.11 mi19136+4006981+2146981+21418081(Top 64%)6391(Top 52%)6391(Top 643%)
Half13.11 mi0.68 mi19103+336966+156966+1518788(Top 66%)6782(Top 55%)6782(Top 682%)
25K15.53 mi2.42 mi18813+2906803+1636803+16317320(Top 61%)6042(Top 49%)6042(Top 608%)
30K18.64 mi3.11 mi18472+3416649+1546649+15417221(Top 61%)6147(Top 50%)6147(Top 618%)
20M20.00 mi1.36 mi18426+466654-56654-517911(Top 63%)6660(Top 54%)6660(Top 670%)
21M21.00 mi1.00 mi18331+956624+306624+3017353(Top 61%)6455(Top 53%)6455(Top 649%)
35K21.75 mi0.75 mi18265+666606+186606+1816936(Top 60%)6306(Top 52%)6306(Top 634%)
23M23.00 mi1.25 mi18223+426615-96615-917577(Top 62%)6774(Top 55%)6774(Top 681%)
24M24.00 mi1.00 mi18182+416617-26617-217557(Top 62%)6793(Top 56%)6793(Top 683%)
40K24.85 mi0.85 mi18165+176636-196636-1917951(Top 63%)7105(Top 58%)7105(Top 715%)
25.2M25.20 mi0.35 mi18213-486675-396675-3919672(Top 69%)7983(Top 65%)7983(Top 803%)
Finish26.22 mi1.02 mi18383-1706794-1196794-11921369(Top 75%)8840(Top 72%)8840(Top 889%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 65%
×21story building
+97ft-345ft

Overall

18406

Females

6560

F55-59

6560

5K→10K

3.1 - 6.2 mi

Top 70%
×5story building
+79ft-138ft

Overall

19978

Females

7450

F55-59

7450

10K→15K

6.2 - 9.3 mi

Top 65%
×3story building
+67ft-78ft

Overall

18406

Females

6560

F55-59

6560

15K→20K

9.3 - 12.4 mi

Top 64%
×5story building
+106ft-86ft

Overall

18081

Females

6391

F55-59

6391

20K→Half

12.4 - 13.1 mi

Top 66%
×2story building
+19ft-37ft

Overall

18788

Females

6782

F55-59

6782

Half→25K

13.1 - 15.5 mi

Top 61%
×4story building
+66ft-88ft

Overall

17320

Females

6042

F55-59

6042

25K→30K

15.5 - 18.6 mi

Top 61%
×9story building
+181ft-148ft

Overall

17221

Females

6147

F55-59

6147

30K→20M

18.6 - 20.0 mi

Top 63%
×5story building
+64ft-50ft

Overall

17911

Females

6660

F55-59

6660

20M→21M

20.0 - 21.0 mi

Top 61%
×8story building
+106ft-24ft

Overall

17353

Females

6455

F55-59

6455

21M→35K

21.0 - 21.8 mi

Top 60%
×7story building
+17ft-86ft

Overall

16936

Females

6306

F55-59

6306

35K→23M

21.8 - 23.0 mi

Top 62%
×5story building
+23ft-63ft

Overall

17577

Females

6774

F55-59

6774

23M→24M

23.0 - 24.0 mi

Top 62%
×6story building
+12ft-82ft

Overall

17557

Females

6793

F55-59

6793

24M→40K

24.0 - 24.9 mi

Top 63%
×1story
+6ft-20ft

Overall

17951

Females

7105

F55-59

7105

40K→25.2M

24.9 - 25.2 mi

Top 69%
×1story
+13ft-16ft

Overall

19672

Females

7983

F55-59

7983

25.2M→Finish

25.2 - 26.2 mi

Top 75%
×2story building
+22ft-21ft

Overall

21369

Females

8840

F55-59

8840

Passing Analysis

Category:
Athletes Passed
2843
Passed By
995
Net Change
+1848
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#20231
5K → 10K349213+136#20231#20095
10K → 15K58425+559#20095#19536
15K → 20K42525+400#19536#19136
20K → Half5522+33#19136#19103
Half → 25K31828+290#19103#18813
25K → 30K42281+341#18813#18472
30K → 20M12781+46#18472#18426
20M → 21M14752+95#18426#18331
21M → 35K9327+66#18331#18265
35K → 23M12381+42#18265#18223
23M → 24M9554+41#18223#18182
24M → 40K7457+17#18182#18165
40K → 25.2M1260-48#18165#18213
25.2M → Finish19189-170#18213#18383
TOTALS2843995+1848
📊

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