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BOSTON MARATHON 2025

Erin Commerford

Bib: 27037•F

NH

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Masters (Masters Women)
#0 / 6759
Division (F50-54)
#0 / 1303
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
9:26/mi
29:17
↑ 97↓ 3451.5%
10K· 6.21 mi
9:21/mi
58:21
↑ 79↓ 1380.4%
15K· 9.32 mi
9:33/mi
1:28:01
↑ 67↓ 78
20K· 12.43 mi
9:49/mi
1:58:30
↑ 106↓ 860.1%
Half· 13.11 mi
9:49/mi
2:05:12
↑ 19↓ 370.5%
25K· 15.53 mi
10:13/mi
2:29:58
↑ 66↓ 880.2%
30K· 18.64 mi
10:40/mi
3:03:07
↑ 181↓ 1480.2%
20M
10:41/mi
3:17:38
↑ 64↓ 500.2%
21M
11:18/mi
3:28:56
↑ 106↓ 241.6%
35K· 21.75 mi
10:23/mi
3:36:42
↑ 17↓ 861.7%
23M
10:56/mi
3:50:23
↑ 23↓ 630.6%
24M
10:44/mi
4:01:07
↓ 821.3%
40K· 24.85 mi
10:49/mi
4:10:22
↓ 200.3%
25.2M
11:42/mi
4:14:24
↑ 13↓ 160.2%
Finish· 26.22 mi
10:30/mi
4:25:06
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:05:12
Pace9:33 /mi
2nd Half
Distance13.11 mi
Time2:19:54
Pace10:40 /mi
📊Positive Split: 11.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:45:1429:179:2629:17
9:26
-
10K
6.21 mi12:14:1858:219:2329:04
9:21
-0:05
15K
9.32 mi12:43:581:28:019:2729:40
9:33
+0:12
20K
12.43 mi13:14:271:58:309:3230:29
9:49
+0:16
Half
13.11 mi13:21:092:05:129:336:42
9:49
0:00
25K
15.53 mi13:45:552:29:589:3924:46
10:13
+0:24
30K
18.64 mi14:19:043:03:079:4933:09
10:40
+0:27
20M
20.00 mi14:33:353:17:389:5314:31
10:41
+0:01
21M
21.00 mi14:44:533:28:569:5711:18
11:18
+0:37
35K
21.75 mi14:52:393:36:429:587:46
10:23
-0:55
23M
23.00 mi15:06:203:50:2310:0113:41
10:56
+0:33
24M
24.00 mi15:17:044:01:0710:0310:44
10:44
-0:12
40K
24.85 mi15:26:194:10:2210:049:15
10:49
+0:05
25.2M
25.20 mi15:30:214:14:2410:064:02
11:42
+0:53
Finish
26.22 mi15:41:034:25:0610:0710:42
10:30
-1:12

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

9:21 /mi

Average Pace

10:07 /mi

Slowest Pace

11:42 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:05:12

47% of race

Time at Steady Pace

1:50:53

42% of race

Time at Slower Pace

29:01

11% of race

Average Pace: 10:07 /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 mi11:45:1429:179:2629:17
9:26
#24000
10K
6.21 mi12:14:1858:219:2329:04
9:21
#23854
15K
9.32 mi12:43:581:28:019:2729:40
9:33
#23881
20K
12.43 mi13:14:271:58:309:3230:29
9:49
#23840
Half
13.11 mi13:21:092:05:129:336:42
9:49
#23870
25K
15.53 mi13:45:552:29:589:3924:46
10:13
#23858
30K
18.64 mi14:19:043:03:079:4933:09
10:40
#23739
20M
20.00 mi14:33:353:17:389:5314:31
10:41
#23673
21M
21.00 mi14:44:533:28:569:5711:18
11:18
#23587
35K
21.75 mi14:52:393:36:429:587:46
10:23
#23558
23M
23.00 mi15:06:203:50:2310:0113:41
10:56
#23518
24M
24.00 mi15:17:044:01:0710:0310:44
10:44
#23505
40K
24.85 mi15:26:194:10:2210:049:15
10:49
#23486
25.2M
25.20 mi15:30:214:14:2410:064:02
11:42
#23463
Finish
26.22 mi15:41:034:25:0610:0710:42
10:30
#23501
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF50-54Seg. OverallSeg. FemalesSeg. F50-54
5K3.11 mi3.11 mi240009697969723877(Top 84%)9589(Top 78%)9589(Top 736%)
10K6.21 mi3.10 mi23854+1469604+939604+9323711(Top 83%)9525(Top 78%)9525(Top 731%)
15K9.32 mi3.11 mi23881-279611-79611-723877(Top 84%)9589(Top 78%)9589(Top 736%)
20K12.43 mi3.11 mi23840+419606+59606+523801(Top 84%)9605(Top 79%)9605(Top 737%)
Half13.11 mi0.68 mi23870-309623-179623-1724439(Top 86%)9960(Top 81%)9960(Top 764%)
25K15.53 mi2.42 mi23858+129619+49619+423758(Top 84%)9619(Top 79%)9619(Top 738%)
30K18.64 mi3.11 mi23739+1199593+269593+2623326(Top 82%)9508(Top 78%)9508(Top 730%)
20M20.00 mi1.36 mi23673+669586+79586+722924(Top 81%)9383(Top 77%)9383(Top 720%)
21M21.00 mi1.00 mi23587+869545+419545+4122164(Top 78%)9063(Top 74%)9063(Top 696%)
35K21.75 mi0.75 mi23558+299543+29543+222926(Top 81%)9520(Top 78%)9520(Top 731%)
23M23.00 mi1.25 mi23518+409537+69537+623065(Top 81%)9639(Top 79%)9639(Top 740%)
24M24.00 mi1.00 mi23505+139540-39540-323410(Top 82%)9835(Top 80%)9835(Top 755%)
40K24.85 mi0.85 mi23486+199553-139553-1322729(Top 80%)9569(Top 78%)9569(Top 734%)
25.2M25.20 mi0.35 mi23463+239550+39550+322590(Top 80%)9466(Top 77%)9466(Top 726%)
Finish26.22 mi1.02 mi23501-389587-379587-3724292(Top 86%)10313(Top 84%)10313(Top 791%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 84%
×21story building
+97ft-345ft

Overall

23877

Females

9589

F50-54

9589

5K→10K

3.1 - 6.2 mi

Top 83%
×5story building
+79ft-138ft

Overall

23711

Females

9525

F50-54

9525

10K→15K

6.2 - 9.3 mi

Top 84%
×3story building
+67ft-78ft

Overall

23877

Females

9589

F50-54

9589

15K→20K

9.3 - 12.4 mi

Top 84%
×5story building
+106ft-86ft

Overall

23801

Females

9605

F50-54

9605

20K→Half

12.4 - 13.1 mi

Top 86%
×2story building
+19ft-37ft

Overall

24439

Females

9960

F50-54

9960

Half→25K

13.1 - 15.5 mi

Top 84%
×4story building
+66ft-88ft

Overall

23758

Females

9619

F50-54

9619

25K→30K

15.5 - 18.6 mi

Top 82%
×9story building
+181ft-148ft

Overall

23326

Females

9508

F50-54

9508

30K→20M

18.6 - 20.0 mi

Top 81%
×5story building
+64ft-50ft

Overall

22924

Females

9383

F50-54

9383

20M→21M

20.0 - 21.0 mi

Top 78%
×8story building
+106ft-24ft

Overall

22164

Females

9063

F50-54

9063

21M→35K

21.0 - 21.8 mi

Top 81%
×7story building
+17ft-86ft

Overall

22926

Females

9520

F50-54

9520

35K→23M

21.8 - 23.0 mi

Top 81%
×5story building
+23ft-63ft

Overall

23065

Females

9639

F50-54

9639

23M→24M

23.0 - 24.0 mi

Top 82%
×6story building
+12ft-82ft

Overall

23410

Females

9835

F50-54

9835

24M→40K

24.0 - 24.9 mi

Top 80%
×1story
+6ft-20ft

Overall

22729

Females

9569

F50-54

9569

40K→25.2M

24.9 - 25.2 mi

Top 80%
×1story
+13ft-16ft

Overall

22590

Females

9466

F50-54

9466

25.2M→Finish

25.2 - 26.2 mi

Top 86%
×2story building
+22ft-21ft

Overall

24292

Females

10313

F50-54

10313

Passing Analysis

Category:
Athletes Passed
1506
Passed By
1007
Net Change
+499
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#24000
5K → 10K323177+146#24000#23854
10K → 15K141168-27#23854#23881
15K → 20K147106+41#23881#23840
20K → Half1444-30#23840#23870
Half → 25K123111+12#23870#23858
25K → 30K21495+119#23858#23739
30K → 20M10539+66#23739#23673
20M → 21M11125+86#23673#23587
21M → 35K5930+29#23587#23558
35K → 23M9252+40#23558#23518
23M → 24M5340+13#23518#23505
24M → 40K5435+19#23505#23486
40K → 25.2M3916+23#23486#23463
25.2M → Finish3169-38#23463#23501
TOTALS15061007+499
📊

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