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BOSTON MARATHON 2025

Heather Nichols

Bib: 27700•F

MA

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

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
28:03
Rank: #22550
Start → 5K
28:03 | 9:02/mi
10K· 6.21 mi
55:37
Rank: #22214 (+336)
5K → 10K
27:34 | 8:52/mi
15K· 9.32 mi
1:23:07
Rank: #21902 (+312)
10K → 15K
27:30 | 8:51/mi
20K· 12.43 mi
1:50:49
Rank: #21544 (+358)
15K → 20K
27:42 | 8:55/mi
Half· 13.11 mi
1:56:55
Rank: #21540 (+4)
20K → Half
6:06 | 8:56/mi
25K· 15.53 mi
2:19:08
Rank: #21365 (+175)
Half → 25K
22:13 | 9:10/mi
30K· 18.64 mi
2:50:38
Rank: #21567 (-202)
25K → 30K
31:30 | 10:08/mi
20M
3:04:18
Rank: #21532 (+35)
30K → 20M
13:40 | 10:03/mi
21M
3:14:55
Rank: #21456 (+76)
20M → 21M
10:37 | 10:37/mi
35K· 21.75 mi
3:22:47
Rank: #21567 (-111)
21M → 35K
7:52 | 10:31/mi
23M
3:35:46
Rank: #21556 (+11)
35K → 23M
12:59 | 10:22/mi
24M
3:46:26
Rank: #21639 (-83)
23M → 24M
10:40 | 10:40/mi
40K· 24.85 mi
3:56:47
Rank: #21825 (-186)
24M → 40K
10:21 | 12:06/mi
25.2M
4:00:57
Rank: #21854 (-29)
40K → 25.2M
4:10 | 12:05/mi
Finish· 26.22 mi
4:11:20
Rank: #21910 (-56)
25.2M → Finish
10:23 | 10:11/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:56:55
Pace8:55 /mi
2nd Half
Distance13.11 mi
Time2:14:25
Pace10:15 /mi
📊Positive Split: 15.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:45:0628:039:0228:03
9:02
-
10K
6.21 mi12:12:4055:378:5727:34
8:52
-0:10
15K
9.32 mi12:40:101:23:078:5527:30
8:51
-0:01
20K
12.43 mi13:07:521:50:498:5527:42
8:55
+0:04
Half
13.11 mi13:13:581:56:558:556:06
8:56
+0:01
25K
15.53 mi13:36:112:19:088:5722:13
9:10
+0:14
30K
18.64 mi14:07:412:50:389:0931:30
10:08
+0:58
20M
20.00 mi14:21:213:04:189:1313:40
10:03
-0:05
21M
21.00 mi14:31:583:14:559:1710:37
10:37
+0:34
35K
21.75 mi14:39:503:22:479:197:52
10:31
-0:06
23M
23.00 mi14:52:493:35:469:2312:59
10:22
-0:09
24M
24.00 mi15:03:293:46:269:2610:40
10:40
+0:18
40K
24.85 mi15:13:503:56:479:3210:21
12:06
+1:26
25.2M
25.20 mi15:18:004:00:579:344:10
12:05
-0:01
Finish
26.22 mi15:28:234:11:209:3610:23
10:11
-1:54

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

8:51 /mi

Average Pace

9:36 /mi

Slowest Pace

12:06 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:19:08

55% of race

Time at Steady Pace

1:27:01

35% of race

Time at Slower Pace

25:11

10% of race

Average Pace: 9:35 /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 mi11:45:0628:039:0228:03
9:02
#22550
10K
6.21 mi12:12:4055:378:5727:34
8:52
#22214
15K
9.32 mi12:40:101:23:078:5527:30
8:51
#21902
20K
12.43 mi13:07:521:50:498:5527:42
8:55
#21544
Half
13.11 mi13:13:581:56:558:556:06
8:56
#21540
25K
15.53 mi13:36:112:19:088:5722:13
9:10
#21365
30K
18.64 mi14:07:412:50:389:0931:30
10:08
#21567
20M
20.00 mi14:21:213:04:189:1313:40
10:03
#21532
21M
21.00 mi14:31:583:14:559:1710:37
10:37
#21456
35K
21.75 mi14:39:503:22:479:197:52
10:31
#21567
23M
23.00 mi14:52:493:35:469:2312:59
10:22
#21556
24M
24.00 mi15:03:293:46:269:2610:40
10:40
#21639
40K
24.85 mi15:13:503:56:479:3210:21
12:06
#21825
25.2M
25.20 mi15:18:004:00:579:344:10
12:05
#21854
Finish
26.22 mi15:28:234:11:209:3610:23
10:11
#21910
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi225508935893521301(Top 75%)8165(Top 67%)8165(Top 149%)
10K6.21 mi3.10 mi22214+3368733+2028733+20221772(Top 77%)8462(Top 69%)8462(Top 155%)
15K9.32 mi3.11 mi21902+3128544+1898544+18921301(Top 75%)8165(Top 67%)8165(Top 149%)
20K12.43 mi3.11 mi21544+3588339+2058339+20520568(Top 72%)7815(Top 64%)7815(Top 143%)
Half13.11 mi0.68 mi21540+48342-38342-321617(Top 76%)8386(Top 69%)8386(Top 153%)
25K15.53 mi2.42 mi21365+1758253+898253+8920635(Top 73%)7895(Top 65%)7895(Top 144%)
30K18.64 mi3.11 mi21567-2028384-1318384-13122025(Top 78%)8787(Top 72%)8787(Top 161%)
20M20.00 mi1.36 mi21532+358385-18385-121161(Top 75%)8451(Top 69%)8451(Top 155%)
21M21.00 mi1.00 mi21456+768364+218364+2120373(Top 72%)8119(Top 66%)8119(Top 148%)
35K21.75 mi0.75 mi21567-1118439-758439-7523221(Top 82%)9661(Top 79%)9661(Top 177%)
23M23.00 mi1.25 mi21556+118465-268465-2621656(Top 76%)8897(Top 73%)8897(Top 163%)
24M24.00 mi1.00 mi21639-838535-708535-7023247(Top 82%)9758(Top 80%)9758(Top 178%)
40K24.85 mi0.85 mi21825-1868667-1328667-13225089(Top 88%)10712(Top 88%)10712(Top 196%)
25.2M25.20 mi0.35 mi21854-298687-208687-2023426(Top 82%)9872(Top 81%)9872(Top 181%)
Finish26.22 mi1.02 mi21910-568729-428729-4223503(Top 83%)9925(Top 81%)9925(Top 181%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 75%
×21stories
+97ft-345ft

Overall

21301

Females

8165

F18-39

8165

5K→10K

3.1 - 6.2 mi

Top 77%
×5stories
+79ft-138ft

Overall

21772

Females

8462

F18-39

8462

10K→15K

6.2 - 9.3 mi

Top 75%
×3stories
+67ft-78ft

Overall

21301

Females

8165

F18-39

8165

15K→20K

9.3 - 12.4 mi

Top 72%
×5stories
+106ft-86ft

Overall

20568

Females

7815

F18-39

7815

20K→Half

12.4 - 13.1 mi

Top 76%
×2stories
+19ft-37ft

Overall

21617

Females

8386

F18-39

8386

Half→25K

13.1 - 15.5 mi

Top 73%
×4stories
+66ft-88ft

Overall

20635

Females

7895

F18-39

7895

25K→30K

15.5 - 18.6 mi

Top 78%
×9stories
+181ft-148ft

Overall

22025

Females

8787

F18-39

8787

30K→20M

18.6 - 20.0 mi

Top 75%
×5stories
+64ft-50ft

Overall

21161

Females

8451

F18-39

8451

20M→21M

20.0 - 21.0 mi

Top 72%
×8stories
+106ft-24ft

Overall

20373

Females

8119

F18-39

8119

21M→35K

21.0 - 21.8 mi

Top 82%
×7stories
+17ft-86ft

Overall

23221

Females

9661

F18-39

9661

35K→23M

21.8 - 23.0 mi

Top 76%
×5stories
+23ft-63ft

Overall

21656

Females

8897

F18-39

8897

23M→24M

23.0 - 24.0 mi

Top 82%
×6stories
+12ft-82ft

Overall

23247

Females

9758

F18-39

9758

24M→40K

24.0 - 24.9 mi

Top 88%
×1story
+6ft-20ft

Overall

25089

Females

10712

F18-39

10712

40K→25.2M

24.9 - 25.2 mi

Top 82%
×1story
+13ft-16ft

Overall

23426

Females

9872

F18-39

9872

25.2M→Finish

25.2 - 26.2 mi

Top 83%
×2stories
+22ft-21ft

Overall

23503

Females

9925

F18-39

9925

Passing Analysis

Category:
Athletes Passed
2079
Passed By
1439
Net Change
+640
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#22550
5K → 10K458122+336#22550#22214
10K → 15K37765+312#22214#21902
15K → 20K39537+358#21902#21544
20K → Half3834+4#21544#21540
Half → 25K23863+175#21540#21365
25K → 30K139341-202#21365#21567
30K → 20M10974+35#21567#21532
20M → 21M12246+76#21532#21456
21M → 35K26137-111#21456#21567
35K → 23M9382+11#21567#21556
23M → 24M26109-83#21556#21639
24M → 40K12198-186#21639#21825
40K → 25.2M1847-29#21825#21854
25.2M → Finish2884-56#21854#21910
TOTALS20791439+640
📊

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