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BOSTON MARATHON 2025

Cher Duffield

Bib: 21865•F

MA

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 32%
Gender (Female)
#0 / 12228
Top 15%
Masters (Masters Women)
#0 / 6759
Top 5%
Division (F50-54)
#0 / 1303
Top 2%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
22:52
Rank: #10955
Start → 5K
22:52 | 7:22/mi
10K· 6.21 mi
45:33
Rank: #10599 (+356)
5K → 10K
22:41 | 7:18/mi
15K· 9.32 mi
1:08:11
Rank: #10348 (+251)
10K → 15K
22:38 | 7:17/mi
20K· 12.43 mi
1:31:05
Rank: #10130 (+218)
15K → 20K
22:54 | 7:22/mi
Half· 13.11 mi
1:35:57
Rank: #10043 (+87)
20K → Half
4:52 | 7:08/mi
25K· 15.53 mi
1:53:59
Rank: #9890 (+153)
Half → 25K
18:02 | 7:26/mi
30K· 18.64 mi
2:17:46
Rank: #9623 (+267)
25K → 30K
23:47 | 7:39/mi
20M
2:28:09
Rank: #9450 (+173)
30K → 20M
10:23 | 7:38/mi
21M
2:36:20
Rank: #9360 (+90)
20M → 21M
8:11 | 8:11/mi
35K· 21.75 mi
2:41:59
Rank: #9325 (+35)
21M → 35K
5:39 | 7:33/mi
23M
2:51:50
Rank: #9244 (+81)
35K → 23M
9:51 | 7:52/mi
24M
2:59:29
Rank: #9211 (+33)
23M → 24M
7:39 | 7:39/mi
40K· 24.85 mi
3:06:03
Rank: #9118 (+93)
24M → 40K
6:34 | 7:41/mi
25.2M
3:08:57
Rank: #9080 (+38)
40K → 25.2M
2:54 | 8:25/mi
Finish· 26.22 mi
3:16:29
Rank: #9019 (+61)
25.2M → Finish
7:32 | 7:24/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:35:57
Pace7:19 /mi
2nd Half
Distance13.11 mi
Time1:40:32
Pace7:40 /mi
📊Positive Split: 4.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:18:2522:527:2222:52
7:22
-
10K
6.21 mi11:41:0645:337:2022:41
7:18
-0:04
15K
9.32 mi12:03:441:08:117:1922:38
7:17
-0:01
20K
12.43 mi12:26:381:31:057:2022:54
7:22
+0:05
Half
13.11 mi12:31:301:35:577:194:52
7:08
-0:14
25K
15.53 mi12:49:321:53:597:2018:02
7:26
+0:18
30K
18.64 mi13:13:192:17:467:2323:47
7:39
+0:13
20M
20.00 mi13:23:422:28:097:2410:23
7:38
-0:01
21M
21.00 mi13:31:532:36:207:278:11
8:11
+0:33
35K
21.75 mi13:37:322:41:597:275:39
7:33
-0:38
23M
23.00 mi13:47:232:51:507:289:51
7:52
+0:19
24M
24.00 mi13:55:022:59:297:297:39
7:39
-0:13
40K
24.85 mi14:01:363:06:037:296:34
7:41
+0:02
25.2M
25.20 mi14:04:303:08:577:302:54
8:25
+0:44
Finish
26.22 mi14:12:023:16:297:307:32
7:24
-1:01

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

7:08 /mi

Average Pace

7:30 /mi

Slowest Pace

8:25 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:55:33

89% of race

Time at Steady Pace

20:56

11% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:30 /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 mi11:18:2522:527:2222:52
7:22
#10955
10K
6.21 mi11:41:0645:337:2022:41
7:18
#10599
15K
9.32 mi12:03:441:08:117:1922:38
7:17
#10348
20K
12.43 mi12:26:381:31:057:2022:54
7:22
#10130
Half
13.11 mi12:31:301:35:577:194:52
7:08
#10043
25K
15.53 mi12:49:321:53:597:2018:02
7:26
#9890
30K
18.64 mi13:13:192:17:467:2323:47
7:39
#9623
20M
20.00 mi13:23:422:28:097:2410:23
7:38
#9450
21M
21.00 mi13:31:532:36:207:278:11
8:11
#9360
35K
21.75 mi13:37:322:41:597:275:39
7:33
#9325
23M
23.00 mi13:47:232:51:507:289:51
7:52
#9244
24M
24.00 mi13:55:022:59:297:297:39
7:39
#9211
40K
24.85 mi14:01:363:06:037:296:34
7:41
#9118
25.2M
25.20 mi14:04:303:08:577:302:54
8:25
#9080
Finish
26.22 mi14:12:023:16:297:307:32
7:24
#9019
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF50-54Seg. OverallSeg. FemalesSeg. F50-54
5K3.11 mi3.11 mi10955225822589895(Top 35%)1841(Top 15%)1841(Top 141%)
10K6.21 mi3.10 mi10599+3562107+1512107+15110363(Top 36%)1991(Top 16%)1991(Top 153%)
15K9.32 mi3.11 mi10348+2511996+1111996+1119895(Top 35%)1841(Top 15%)1841(Top 141%)
20K12.43 mi3.11 mi10130+2181926+701926+709661(Top 34%)1813(Top 15%)1813(Top 139%)
Half13.11 mi0.68 mi10043+871890+361890+368624(Top 30%)1345(Top 11%)1345(Top 103%)
25K15.53 mi2.42 mi9890+1531855+351855+359460(Top 33%)1851(Top 15%)1851(Top 142%)
30K18.64 mi3.11 mi9623+2671789+661789+668870(Top 31%)1776(Top 15%)1776(Top 136%)
20M20.00 mi1.36 mi9450+1731750+391750+398001(Top 28%)1544(Top 13%)1544(Top 118%)
21M21.00 mi1.00 mi9360+901736+141736+148502(Top 30%)1937(Top 16%)1937(Top 149%)
35K21.75 mi0.75 mi9325+351740-41740-49038(Top 32%)2132(Top 17%)2132(Top 164%)
23M23.00 mi1.25 mi9244+811748-81748-89066(Top 32%)2283(Top 19%)2283(Top 175%)
24M24.00 mi1.00 mi9211+331760-121760-128796(Top 31%)2222(Top 18%)2222(Top 171%)
40K24.85 mi0.85 mi9118+931755+51755+57987(Top 28%)1979(Top 16%)1979(Top 152%)
25.2M25.20 mi0.35 mi9080+38175517558305(Top 29%)2185(Top 18%)2185(Top 168%)
Finish26.22 mi1.02 mi9019+611778-231778-238440(Top 30%)2251(Top 18%)2251(Top 173%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 35%
×21stories
+97ft-345ft

Overall

9895

Females

1841

F50-54

1841

5K→10K

3.1 - 6.2 mi

Top 36%
×5stories
+79ft-138ft

Overall

10363

Females

1991

F50-54

1991

10K→15K

6.2 - 9.3 mi

Top 35%
×3stories
+67ft-78ft

Overall

9895

Females

1841

F50-54

1841

15K→20K

9.3 - 12.4 mi

Top 34%
×5stories
+106ft-86ft

Overall

9661

Females

1813

F50-54

1813

20K→Half

12.4 - 13.1 mi

Top 30%
×2stories
+19ft-37ft

Overall

8624

Females

1345

F50-54

1345

Half→25K

13.1 - 15.5 mi

Top 33%
×4stories
+66ft-88ft

Overall

9460

Females

1851

F50-54

1851

25K→30K

15.5 - 18.6 mi

Top 31%
×9stories
+181ft-148ft

Overall

8870

Females

1776

F50-54

1776

30K→20M

18.6 - 20.0 mi

Top 28%
×5stories
+64ft-50ft

Overall

8001

Females

1544

F50-54

1544

20M→21M

20.0 - 21.0 mi

Top 30%
×8stories
+106ft-24ft

Overall

8502

Females

1937

F50-54

1937

21M→35K

21.0 - 21.8 mi

Top 32%
×7stories
+17ft-86ft

Overall

9038

Females

2132

F50-54

2132

35K→23M

21.8 - 23.0 mi

Top 32%
×5stories
+23ft-63ft

Overall

9066

Females

2283

F50-54

2283

23M→24M

23.0 - 24.0 mi

Top 31%
×6stories
+12ft-82ft

Overall

8796

Females

2222

F50-54

2222

24M→40K

24.0 - 24.9 mi

Top 28%
×1story
+6ft-20ft

Overall

7987

Females

1979

F50-54

1979

40K→25.2M

24.9 - 25.2 mi

Top 29%
×1story
+13ft-16ft

Overall

8305

Females

2185

F50-54

2185

25.2M→Finish

25.2 - 26.2 mi

Top 30%
×2stories
+22ft-21ft

Overall

8440

Females

2251

F50-54

2251

Passing Analysis

Category:
Athletes Passed
2698*
Passed By
761
Net Change
+1936
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#10955
5K → 10K485129+356#10955#10599
10K → 15K30655+251#10599#10348
15K → 20K28869+218#10348#10130
20K → Half892+87#10130#10043
Half → 25K225*72+153#10043#9890
25K → 30K367100+267#9890#9623
30K → 20M19320+173#9623#9450
20M → 21M13242+90#9450#9360
21M → 35K7641+35#9360#9325
35K → 23M14463+81#9325#9244
23M → 24M9966+33#9244#9211
24M → 40K12532+93#9211#9118
40K → 25.2M5618+38#9118#9080
25.2M → Finish11352+61#9080#9019
TOTALS2698*761+1936

* Includes athletes who did not complete a segment (DNF/DNQ).

📊

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