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BOSTON MARATHON 2025

Heidi Dew

Bib: 10522•F

CT

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 13%
Gender (Female)
#0 / 12228
Top 2%
Division (F18-39)
#0 / 5469
Top 4%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
20:40
Rank: #5052
Start → 5K
20:40 | 6:39/mi
10K· 6.21 mi
41:01
Rank: #4520 (+532)
5K → 10K
20:21 | 6:33/mi
15K· 9.32 mi
1:01:45
Rank: #4590 (-70)
10K → 15K
20:44 | 6:40/mi
20K· 12.43 mi
1:22:36
Rank: #4531 (+59)
15K → 20K
20:51 | 6:43/mi
Half· 13.11 mi
1:27:08
Rank: #4543 (-12)
20K → Half
4:32 | 6:39/mi
25K· 15.53 mi
1:43:17
Rank: #4366 (+177)
Half → 25K
16:09 | 6:40/mi
30K· 18.64 mi
2:04:21
Rank: #4091 (+275)
25K → 30K
21:04 | 6:47/mi
20M
2:13:41
Rank: #4003 (+88)
30K → 20M
9:20 | 6:52/mi
21M
2:20:46
Rank: #3871 (+132)
20M → 21M
7:05 | 7:05/mi
35K· 21.75 mi
2:25:42
Rank: #3823 (+48)
21M → 35K
4:56 | 6:36/mi
23M
2:34:25
Rank: #3774 (+49)
35K → 23M
8:43 | 6:58/mi
24M
2:41:09
Rank: #3724 (+50)
23M → 24M
6:44 | 6:44/mi
40K· 24.85 mi
2:47:05
Rank: #3675 (+49)
24M → 40K
5:56 | 6:56/mi
25.2M
2:49:37
Rank: #3630 (+45)
40K → 25.2M
2:32 | 7:21/mi
Finish· 26.22 mi
2:56:21
Rank: #3584 (+46)
25.2M → Finish
6:44 | 6:36/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:27:08
Pace6:39 /mi
2nd Half
Distance13.11 mi
Time1:29:13
Pace6:48 /mi
📊Positive Split: 2.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:46:3520:406:3920:40
6:39
-
10K
6.21 mi11:06:5641:016:3620:21
6:33
-0:06
15K
9.32 mi11:27:401:01:456:3820:44
6:40
+0:07
20K
12.43 mi11:48:311:22:366:3920:51
6:43
+0:03
Half
13.11 mi11:53:031:27:086:394:32
6:39
-0:04
25K
15.53 mi12:09:121:43:176:3916:09
6:40
+0:01
30K
18.64 mi12:30:162:04:216:4021:04
6:47
+0:07
20M
20.00 mi12:39:362:13:416:419:20
6:52
+0:05
21M
21.00 mi12:46:412:20:466:427:05
7:05
+0:13
35K
21.75 mi12:51:372:25:426:424:56
6:36
-0:29
23M
23.00 mi13:00:202:34:256:438:43
6:58
+0:22
24M
24.00 mi13:07:042:41:096:436:44
6:44
-0:14
40K
24.85 mi13:13:002:47:056:435:56
6:56
+0:12
25.2M
25.20 mi13:15:322:49:376:442:32
7:21
+0:25
Finish
26.22 mi13:22:162:56:216:446:44
6:36
-0:45

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

6:33 /mi

Average Pace

6:44 /mi

Slowest Pace

7:21 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:53:49

99% of race

Time at Steady Pace

2:32

1% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:44 /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 mi10:46:3520:406:3920:40
6:39
#5052
10K
6.21 mi11:06:5641:016:3620:21
6:33
#4520
15K
9.32 mi11:27:401:01:456:3820:44
6:40
#4590
20K
12.43 mi11:48:311:22:366:3920:51
6:43
#4531
Half
13.11 mi11:53:031:27:086:394:32
6:39
#4543
25K
15.53 mi12:09:121:43:176:3916:09
6:40
#4366
30K
18.64 mi12:30:162:04:216:4021:04
6:47
#4091
20M
20.00 mi12:39:362:13:416:419:20
6:52
#4003
21M
21.00 mi12:46:412:20:466:427:05
7:05
#3871
35K
21.75 mi12:51:372:25:426:424:56
6:36
#3823
23M
23.00 mi13:00:202:34:256:438:43
6:58
#3774
24M
24.00 mi13:07:042:41:096:436:44
6:44
#3724
40K
24.85 mi13:13:002:47:056:435:56
6:56
#3675
25.2M
25.20 mi13:15:322:49:376:442:32
7:21
#3630
Finish
26.22 mi13:22:162:56:216:446:44
6:36
#3584
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi50523273274856(Top 17%)319(Top 3%)319(Top 6%)
10K6.21 mi3.10 mi4520+532264+63264+634092(Top 14%)234(Top 2%)234(Top 4%)
15K9.32 mi3.11 mi4590-70278-14278-144856(Top 17%)319(Top 3%)319(Top 6%)
20K12.43 mi3.11 mi4531+592782784548(Top 16%)306(Top 3%)306(Top 6%)
Half13.11 mi0.68 mi4543-12282-4282-44882(Top 17%)330(Top 3%)330(Top 6%)
25K15.53 mi2.42 mi4366+177263+19263+193884(Top 14%)239(Top 2%)239(Top 4%)
30K18.64 mi3.11 mi4091+275244+19244+193338(Top 12%)208(Top 2%)208(Top 4%)
20M20.00 mi1.36 mi4003+88241+3241+33350(Top 12%)240(Top 2%)240(Top 4%)
21M21.00 mi1.00 mi3871+132230+11230+112642(Top 9%)178(Top 1%)178(Top 3%)
35K21.75 mi0.75 mi3823+48227+3227+32979(Top 10%)225(Top 2%)225(Top 4%)
23M23.00 mi1.25 mi3774+49233-6233-63557(Top 13%)322(Top 3%)322(Top 6%)
24M24.00 mi1.00 mi3724+50236-3236-33170(Top 11%)296(Top 2%)296(Top 5%)
40K24.85 mi0.85 mi3675+49237-1237-13599(Top 13%)394(Top 3%)394(Top 7%)
25.2M25.20 mi0.35 mi3630+45235+2235+22819(Top 10%)295(Top 2%)295(Top 5%)
Finish26.22 mi1.02 mi3584+46234+1234+13398(Top 12%)406(Top 3%)406(Top 7%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 17%
×21stories
+97ft-345ft

Overall

4856

Females

319

F18-39

319

5K→10K

3.1 - 6.2 mi

Top 14%
×5stories
+79ft-138ft

Overall

4092

Females

234

F18-39

234

10K→15K

6.2 - 9.3 mi

Top 17%
×3stories
+67ft-78ft

Overall

4856

Females

319

F18-39

319

15K→20K

9.3 - 12.4 mi

Top 16%
×5stories
+106ft-86ft

Overall

4548

Females

306

F18-39

306

20K→Half

12.4 - 13.1 mi

Top 17%
×2stories
+19ft-37ft

Overall

4882

Females

330

F18-39

330

Half→25K

13.1 - 15.5 mi

Top 14%
×4stories
+66ft-88ft

Overall

3884

Females

239

F18-39

239

25K→30K

15.5 - 18.6 mi

Top 12%
×9stories
+181ft-148ft

Overall

3338

Females

208

F18-39

208

30K→20M

18.6 - 20.0 mi

Top 12%
×5stories
+64ft-50ft

Overall

3350

Females

240

F18-39

240

20M→21M

20.0 - 21.0 mi

Top 9%
×8stories
+106ft-24ft

Overall

2642

Females

178

F18-39

178

21M→35K

21.0 - 21.8 mi

Top 10%
×7stories
+17ft-86ft

Overall

2979

Females

225

F18-39

225

35K→23M

21.8 - 23.0 mi

Top 13%
×5stories
+23ft-63ft

Overall

3557

Females

322

F18-39

322

23M→24M

23.0 - 24.0 mi

Top 11%
×6stories
+12ft-82ft

Overall

3170

Females

296

F18-39

296

24M→40K

24.0 - 24.9 mi

Top 13%
×1story
+6ft-20ft

Overall

3599

Females

394

F18-39

394

40K→25.2M

24.9 - 25.2 mi

Top 10%
×1story
+13ft-16ft

Overall

2819

Females

295

F18-39

295

25.2M→Finish

25.2 - 26.2 mi

Top 12%
×2stories
+22ft-21ft

Overall

3398

Females

406

F18-39

406

Passing Analysis

Category:
Athletes Passed
1931
Passed By
463
Net Change
+1468
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#5052
5K → 10K54816+532#5052#4520
10K → 15K75145-70#4520#4590
15K → 20K14283+59#4590#4531
20K → Half1022-12#4531#4543
Half → 25K19619+177#4543#4366
25K → 30K30732+275#4366#4091
30K → 20M10315+88#4091#4003
20M → 21M1408+132#4003#3871
21M → 35K568+48#3871#3823
35K → 23M9243+49#3823#3774
23M → 24M6919+50#3774#3724
24M → 40K7021+49#3724#3675
40K → 25.2M505+45#3675#3630
25.2M → Finish7327+46#3630#3584
TOTALS1931463+1468
📊

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