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BOSTON MARATHON 2025

Mallory Horton

Bib: 15786•F

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0:00
0:00
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Top 47%
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
25:06
Rank: #17229
Start → 5K
8:05/mi
25:06 split
10K· 6.21 mi
49:34
Rank: #16328 (+901)
5K → 10K
7:53/mi
24:28 split
15K· 9.32 mi
1:13:44
Rank: #15596 (+732)
10K → 15K
7:47/mi
24:10 split
20K· 12.43 mi
1:38:45
Rank: #15516 (+80)
15K → 20K
8:03/mi
25:01 split
Half· 13.11 mi
1:44:19
Rank: #15612 (-96)
20K → Half
8:10/mi
5:34 split
25K· 15.53 mi
2:04:55
Rank: #15898 (-286)
Half → 25K
8:30/mi
20:36 split
30K· 18.64 mi
2:32:12
Rank: #15976 (-78)
25K → 30K
8:47/mi
27:17 split
20M
2:44:38
Rank: #16087 (-111)
30K → 20M
9:09/mi
12:26 split
21M
2:54:11
Rank: #16048 (+39)
20M → 21M
9:33/mi
9:33 split
35K· 21.75 mi
3:01:03
Rank: #16145 (-97)
21M → 35K
9:11/mi
6:52 split
23M
3:12:52
Rank: #16236 (-91)
35K → 23M
9:26/mi
11:49 split
24M
3:22:08
Rank: #16359 (-123)
23M → 24M
9:16/mi
9:16 split
40K· 24.85 mi
3:30:06
Rank: #16422 (-63)
24M → 40K
9:19/mi
7:58 split
25.2M
3:33:30
Rank: #16428 (-6)
40K → 25.2M
9:52/mi
3:24 split
Finish· 26.22 mi
3:42:24
Rank: #16469 (-41)
25.2M → Finish
8:44/mi
8:54 split

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:44:19
Pace7:57 /mi
2nd Half
Distance13.11 mi
Time1:58:05
Pace9:00 /mi
📊Positive Split: 13.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:57:5825:068:0525:06
8:05
-
10K
6.21 mi11:22:2649:347:5924:28
7:53
-0:12
15K
9.32 mi11:46:361:13:447:5524:10
7:47
-0:06
20K
12.43 mi12:11:371:38:457:5725:01
8:03
+0:16
Half
13.11 mi12:17:111:44:197:575:34
8:10
+0:07
25K
15.53 mi12:37:472:04:558:0220:36
8:30
+0:20
30K
18.64 mi13:05:042:32:128:1027:17
8:47
+0:17
20M
20.00 mi13:17:302:44:388:1412:26
9:09
+0:22
21M
21.00 mi13:27:032:54:118:189:33
9:33
+0:24
35K
21.75 mi13:33:553:01:038:196:52
9:11
-0:22
23M
23.00 mi13:45:443:12:528:2311:49
9:26
+0:15
24M
24.00 mi13:55:003:22:088:259:16
9:16
-0:10
40K
24.85 mi14:02:583:30:068:277:58
9:19
+0:03
25.2M
25.20 mi14:06:223:33:308:283:24
9:52
+0:33
Finish
26.22 mi14:15:163:42:248:298:54
8:44
-1:08

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

7:47 /mi

Average Pace

8:29 /mi

Slowest Pace

9:52 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:44:19

47% of race

Time at Steady Pace

56:47

26% of race

Time at Slower Pace

1:01:18

28% of race

Average Pace: 8:29 /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 mi10:57:5825:068:0525:06
8:05
#17229
10K
6.21 mi11:22:2649:347:5924:28
7:53
#16328
15K
9.32 mi11:46:361:13:447:5524:10
7:47
#15596
20K
12.43 mi12:11:371:38:457:5725:01
8:03
#15516
Half
13.11 mi12:17:111:44:197:575:34
8:10
#15612
25K
15.53 mi12:37:472:04:558:0220:36
8:30
#15898
30K
18.64 mi13:05:042:32:128:1027:17
8:47
#15976
20M
20.00 mi13:17:302:44:388:1412:26
9:09
#16087
21M
21.00 mi13:27:032:54:118:189:33
9:33
#16048
35K
21.75 mi13:33:553:01:038:196:52
9:11
#16145
23M
23.00 mi13:45:443:12:528:2311:49
9:26
#16236
24M
24.00 mi13:55:003:22:088:259:16
9:16
#16359
40K
24.85 mi14:02:583:30:068:277:58
9:19
#16422
25.2M
25.20 mi14:06:223:33:308:283:24
9:52
#16428
Finish
26.22 mi14:15:163:42:248:298:54
8:44
#16469
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi172295876587614206(Top 50%)4145(Top 34%)4145(Top 76%)
10K6.21 mi3.10 mi16328+9015338+5385338+53815501(Top 55%)4839(Top 40%)4839(Top 88%)
15K9.32 mi3.11 mi15596+7324898+4404898+44014206(Top 50%)4145(Top 34%)4145(Top 76%)
20K12.43 mi3.11 mi15516+804873+254873+2515315(Top 54%)4813(Top 39%)4813(Top 88%)
Half13.11 mi0.68 mi15612-964940-674940-6717063(Top 60%)5801(Top 47%)5801(Top 106%)
25K15.53 mi2.42 mi15898-2865107-1675107-16717183(Top 60%)5960(Top 49%)5960(Top 109%)
30K18.64 mi3.11 mi15976-785206-995206-9916494(Top 58%)5739(Top 47%)5739(Top 105%)
20M20.00 mi1.36 mi16087-1115314-1085314-10817535(Top 62%)6432(Top 53%)6432(Top 118%)
21M21.00 mi1.00 mi16048+395327-135327-1316325(Top 57%)5884(Top 48%)5884(Top 108%)
35K21.75 mi0.75 mi16145-975410-835410-8319097(Top 67%)7492(Top 61%)7492(Top 137%)
23M23.00 mi1.25 mi16236-915484-745484-7418417(Top 65%)7191(Top 59%)7191(Top 131%)
24M24.00 mi1.00 mi16359-1235582-985582-9818677(Top 66%)7372(Top 60%)7372(Top 135%)
40K24.85 mi0.85 mi16422-635647-655647-6517937(Top 63%)7091(Top 58%)7091(Top 130%)
25.2M25.20 mi0.35 mi16428-65656-95656-916430(Top 58%)6291(Top 51%)6291(Top 115%)
Finish26.22 mi1.02 mi16469-415714-585714-5817687(Top 62%)6912(Top 57%)6912(Top 126%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 50%
×21story building
+97ft-345ft

Overall

14206

Females

4145

F18-39

4145

5K→10K

3.1 - 6.2 mi

Top 55%
×5story building
+79ft-138ft

Overall

15501

Females

4839

F18-39

4839

10K→15K

6.2 - 9.3 mi

Top 50%
×3story building
+67ft-78ft

Overall

14206

Females

4145

F18-39

4145

15K→20K

9.3 - 12.4 mi

Top 54%
×5story building
+106ft-86ft

Overall

15315

Females

4813

F18-39

4813

20K→Half

12.4 - 13.1 mi

Top 60%
×2story building
+19ft-37ft

Overall

17063

Females

5801

F18-39

5801

Half→25K

13.1 - 15.5 mi

Top 60%
×4story building
+66ft-88ft

Overall

17183

Females

5960

F18-39

5960

25K→30K

15.5 - 18.6 mi

Top 58%
×9story building
+181ft-148ft

Overall

16494

Females

5739

F18-39

5739

30K→20M

18.6 - 20.0 mi

Top 62%
×5story building
+64ft-50ft

Overall

17535

Females

6432

F18-39

6432

20M→21M

20.0 - 21.0 mi

Top 57%
×8story building
+106ft-24ft

Overall

16325

Females

5884

F18-39

5884

21M→35K

21.0 - 21.8 mi

Top 67%
×7story building
+17ft-86ft

Overall

19097

Females

7492

F18-39

7492

35K→23M

21.8 - 23.0 mi

Top 65%
×5story building
+23ft-63ft

Overall

18417

Females

7191

F18-39

7191

23M→24M

23.0 - 24.0 mi

Top 66%
×6story building
+12ft-82ft

Overall

18677

Females

7372

F18-39

7372

24M→40K

24.0 - 24.9 mi

Top 63%
×1story
+6ft-20ft

Overall

17937

Females

7091

F18-39

7091

40K→25.2M

24.9 - 25.2 mi

Top 58%
×1story
+13ft-16ft

Overall

16430

Females

6291

F18-39

6291

25.2M→Finish

25.2 - 26.2 mi

Top 62%
×2story building
+22ft-21ft

Overall

17687

Females

6912

F18-39

6912

Passing Analysis

Category:
Athletes Passed
2786
Passed By
2026
Net Change
+760
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#17229
5K → 10K96463+901#17229#16328
10K → 15K74816+732#16328#15596
15K → 20K237157+80#15596#15516
20K → Half11107-96#15516#15612
Half → 25K108394-286#15612#15898
25K → 30K205283-78#15898#15976
30K → 20M81192-111#15976#16087
20M → 21M11879+39#16087#16048
21M → 35K42139-97#16048#16145
35K → 23M82173-91#16145#16236
23M → 24M49172-123#16236#16359
24M → 40K46109-63#16359#16422
40K → 25.2M2733-6#16422#16428
25.2M → Finish68109-41#16428#16469
TOTALS27862026+760
📊

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