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BOSTON MARATHON 2025

Marissa Nelson

Bib: 26423•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
28:01
Rank: #22495
Start → 5K
28:01 | 9:01/mi
10K· 6.21 mi
56:44
Rank: #22944 (-449)
5K → 10K
28:43 | 9:15/mi
15K· 9.32 mi
1:25:19
Rank: #22921 (+23)
10K → 15K
28:35 | 9:12/mi
20K· 12.43 mi
1:54:23
Rank: #22802 (+119)
15K → 20K
29:04 | 9:21/mi
Half· 13.11 mi
2:00:38
Rank: #22786 (+16)
20K → Half
6:15 | 9:10/mi
25K· 15.53 mi
2:24:15
Rank: #22742 (+44)
Half → 25K
23:37 | 9:44/mi
30K· 18.64 mi
2:55:05
Rank: #22463 (+279)
25K → 30K
30:50 | 9:55/mi
20M
3:08:36
Rank: #22346 (+117)
30K → 20M
13:31 | 9:57/mi
21M
3:19:18
Rank: #22214 (+132)
20M → 21M
10:42 | 10:42/mi
35K· 21.75 mi
3:26:32
Rank: #22169 (+45)
21M → 35K
7:14 | 9:40/mi
23M
3:39:35
Rank: #22120 (+49)
35K → 23M
13:03 | 10:25/mi
24M
3:49:26
Rank: #22060 (+60)
23M → 24M
9:51 | 9:51/mi
40K· 24.85 mi
3:58:47
Rank: #22104 (-44)
24M → 40K
9:21 | 10:56/mi
25.2M
4:03:17
Rank: #22173 (-69)
40K → 25.2M
4:30 | 13:03/mi
Finish· 26.22 mi
4:13:10
Rank: #22137 (+36)
25.2M → Finish
9:53 | 9:42/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:00:38
Pace9:12 /mi
2nd Half
Distance13.11 mi
Time2:12:32
Pace10:07 /mi
📊Positive Split: 9.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:43:3628:019:0128:01
9:01
-
10K
6.21 mi12:12:1956:449:0828:43
9:15
+0:14
15K
9.32 mi12:40:541:25:199:0928:35
9:12
-0:03
20K
12.43 mi13:09:581:54:239:1229:04
9:21
+0:09
Half
13.11 mi13:16:132:00:389:126:15
9:10
-0:11
25K
15.53 mi13:39:502:24:159:1723:37
9:44
+0:34
30K
18.64 mi14:10:402:55:059:2430:50
9:55
+0:11
20M
20.00 mi14:24:113:08:369:2613:31
9:57
+0:02
21M
21.00 mi14:34:533:19:189:2910:42
10:42
+0:45
35K
21.75 mi14:42:073:26:329:307:14
9:40
-1:02
23M
23.00 mi14:55:103:39:359:3313:03
10:25
+0:45
24M
24.00 mi15:05:013:49:269:349:51
9:51
-0:34
40K
24.85 mi15:14:223:58:479:369:21
10:56
+1:05
25.2M
25.20 mi15:18:524:03:179:394:30
13:03
+2:07
Finish
26.22 mi15:28:454:13:109:409:53
9:42
-3:21

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

9:01 /mi

Average Pace

9:40 /mi

Slowest Pace

13:03 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:02:51

25% of race

Time at Steady Pace

2:32:43

60% of race

Time at Slower Pace

37:36

15% of race

Average Pace: 9:39 /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 mi11:43:3628:019:0128:01
9:01
#22495
10K
6.21 mi12:12:1956:449:0828:43
9:15
#22944
15K
9.32 mi12:40:541:25:199:0928:35
9:12
#22921
20K
12.43 mi13:09:581:54:239:1229:04
9:21
#22802
Half
13.11 mi13:16:132:00:389:126:15
9:10
#22786
25K
15.53 mi13:39:502:24:159:1723:37
9:44
#22742
30K
18.64 mi14:10:402:55:059:2430:50
9:55
#22463
20M
20.00 mi14:24:113:08:369:2613:31
9:57
#22346
21M
21.00 mi14:34:533:19:189:2910:42
10:42
#22214
35K
21.75 mi14:42:073:26:329:307:14
9:40
#22169
23M
23.00 mi14:55:103:39:359:3313:03
10:25
#22120
24M
24.00 mi15:05:013:49:269:349:51
9:51
#22060
40K
24.85 mi15:14:223:58:479:369:21
10:56
#22104
25.2M
25.20 mi15:18:524:03:179:394:30
13:03
#22173
Finish
26.22 mi15:28:454:13:109:409:53
9:42
#22137
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi224958903890322864(Top 80%)9026(Top 74%)9026(Top 165%)
10K6.21 mi3.10 mi22944-4499121-2189121-21823351(Top 82%)9324(Top 76%)9324(Top 170%)
15K9.32 mi3.11 mi22921+239082+399082+3922864(Top 80%)9026(Top 74%)9026(Top 165%)
20K12.43 mi3.11 mi22802+1199008+749008+7422434(Top 79%)8829(Top 72%)8829(Top 161%)
Half13.11 mi0.68 mi22786+169002+69002+622482(Top 79%)8873(Top 73%)8873(Top 162%)
25K15.53 mi2.42 mi22742+448999+38999+322611(Top 80%)8986(Top 73%)8986(Top 164%)
30K18.64 mi3.11 mi22463+2798893+1068893+10621383(Top 75%)8445(Top 69%)8445(Top 154%)
20M20.00 mi1.36 mi22346+1178843+508843+5020781(Top 73%)8244(Top 67%)8244(Top 151%)
21M21.00 mi1.00 mi22214+1328783+608783+6020617(Top 73%)8258(Top 68%)8258(Top 151%)
35K21.75 mi0.75 mi22169+458770+138770+1320928(Top 74%)8471(Top 69%)8471(Top 155%)
23M23.00 mi1.25 mi22120+498786-168786-1621815(Top 77%)8972(Top 73%)8972(Top 164%)
24M24.00 mi1.00 mi22060+608771+158771+1520918(Top 74%)8568(Top 70%)8568(Top 157%)
40K24.85 mi0.85 mi22104-448815-448815-4423012(Top 81%)9709(Top 79%)9709(Top 178%)
25.2M25.20 mi0.35 mi22173-698858-438858-4325120(Top 88%)10742(Top 88%)10742(Top 196%)
Finish26.22 mi1.02 mi22137+368858885821935(Top 77%)9126(Top 75%)9126(Top 167%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 80%
×21stories
+97ft-345ft

Overall

22864

Females

9026

F18-39

9026

5K→10K

3.1 - 6.2 mi

Top 82%
×5stories
+79ft-138ft

Overall

23351

Females

9324

F18-39

9324

10K→15K

6.2 - 9.3 mi

Top 80%
×3stories
+67ft-78ft

Overall

22864

Females

9026

F18-39

9026

15K→20K

9.3 - 12.4 mi

Top 79%
×5stories
+106ft-86ft

Overall

22434

Females

8829

F18-39

8829

20K→Half

12.4 - 13.1 mi

Top 79%
×2stories
+19ft-37ft

Overall

22482

Females

8873

F18-39

8873

Half→25K

13.1 - 15.5 mi

Top 80%
×4stories
+66ft-88ft

Overall

22611

Females

8986

F18-39

8986

25K→30K

15.5 - 18.6 mi

Top 75%
×9stories
+181ft-148ft

Overall

21383

Females

8445

F18-39

8445

30K→20M

18.6 - 20.0 mi

Top 73%
×5stories
+64ft-50ft

Overall

20781

Females

8244

F18-39

8244

20M→21M

20.0 - 21.0 mi

Top 73%
×8stories
+106ft-24ft

Overall

20617

Females

8258

F18-39

8258

21M→35K

21.0 - 21.8 mi

Top 74%
×7stories
+17ft-86ft

Overall

20928

Females

8471

F18-39

8471

35K→23M

21.8 - 23.0 mi

Top 77%
×5stories
+23ft-63ft

Overall

21815

Females

8972

F18-39

8972

23M→24M

23.0 - 24.0 mi

Top 74%
×6stories
+12ft-82ft

Overall

20918

Females

8568

F18-39

8568

24M→40K

24.0 - 24.9 mi

Top 81%
×1story
+6ft-20ft

Overall

23012

Females

9709

F18-39

9709

40K→25.2M

24.9 - 25.2 mi

Top 88%
×1story
+13ft-16ft

Overall

25120

Females

10742

F18-39

10742

25.2M→Finish

25.2 - 26.2 mi

Top 77%
×2stories
+22ft-21ft

Overall

21935

Females

9126

F18-39

9126

Passing Analysis

Category:
Athletes Passed
1677
Passed By
1319
Net Change
+358
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#22495
5K → 10K94543-449#22495#22944
10K → 15K178155+23#22944#22921
15K → 20K238119+119#22921#22802
20K → Half4226+16#22802#22786
Half → 25K159115+44#22786#22742
25K → 30K33455+279#22742#22463
30K → 20M13417+117#22463#22346
20M → 21M15422+132#22346#22214
21M → 35K6520+45#22214#22169
35K → 23M10556+49#22169#22120
23M → 24M7717+60#22120#22060
24M → 40K2973-44#22060#22104
40K → 25.2M473-69#22104#22173
25.2M → Finish6428+36#22173#22137
TOTALS16771319+358
📊

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