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BOSTON MARATHON 2025

Kathryn Seyfarth

Bib: 14956•F

MA

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 41%
Gender (Female)
#0 / 12228
Top 25%
Division (F18-39)
#0 / 5469
Top 42%
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
7:32/mi
23:23
↑ 97↓ 3451.5%
10K· 6.21 mi
7:37/mi
47:03
↑ 79↓ 1380.4%
15K· 9.32 mi
7:30/mi
1:10:22
↑ 67↓ 78
20K· 12.43 mi
7:38/mi
1:34:05
↑ 106↓ 860.1%
Half· 13.11 mi
7:37/mi
1:39:17
↑ 19↓ 370.5%
25K· 15.53 mi
8:00/mi
1:58:42
↑ 66↓ 880.2%
30K· 18.64 mi
8:07/mi
2:23:56
↑ 181↓ 1480.2%
20M
8:12/mi
2:35:04
↑ 64↓ 500.2%
21M
8:38/mi
2:43:42
↑ 106↓ 241.6%
35K· 21.75 mi
7:55/mi
2:49:37
↑ 17↓ 861.7%
23M
7:59/mi
2:59:37
↑ 23↓ 630.6%
24M
7:54/mi
3:07:31
↓ 821.3%
40K· 24.85 mi
7:56/mi
3:14:18
↓ 200.3%
25.2M
8:30/mi
3:17:14
↑ 13↓ 160.2%
Finish· 26.22 mi
7:25/mi
3:24:47
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:39:17
Pace7:34 /mi
2nd Half
Distance13.11 mi
Time1:45:30
Pace8:03 /mi
📊Positive Split: 6.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:53:5223:237:3223:23
7:32
-
10K
6.21 mi11:17:3247:037:3423:40
7:37
+0:05
15K
9.32 mi11:40:511:10:227:3323:19
7:30
-0:07
20K
12.43 mi12:04:341:34:057:3423:43
7:38
+0:08
Half
13.11 mi12:09:461:39:177:345:12
7:37
-0:01
25K
15.53 mi12:29:111:58:427:3819:25
8:00
+0:23
30K
18.64 mi12:54:252:23:567:4325:14
8:07
+0:07
20M
20.00 mi13:05:332:35:047:4511:08
8:12
+0:05
21M
21.00 mi13:14:112:43:427:488:38
8:38
+0:26
35K
21.75 mi13:20:062:49:377:485:55
7:55
-0:43
23M
23.00 mi13:30:062:59:377:4910:00
7:59
+0:04
24M
24.00 mi13:38:003:07:317:497:54
7:54
-0:05
40K
24.85 mi13:44:473:14:187:496:47
7:56
+0:02
25.2M
25.20 mi13:47:433:17:147:502:56
8:30
+0:34
Finish
26.22 mi13:55:163:24:477:497:33
7:25
-1:05

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

7:25 /mi

Average Pace

7:49 /mi

Slowest Pace

8:38 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:02:05

89% of race

Time at Steady Pace

22:42

11% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:49 /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 mi10:53:5223:237:3223:23
7:32
#12482
10K
6.21 mi11:17:3247:037:3423:40
7:37
#12775
15K
9.32 mi11:40:511:10:227:3323:19
7:30
#12428
20K
12.43 mi12:04:341:34:057:3423:43
7:38
#12252
Half
13.11 mi12:09:461:39:177:345:12
7:37
#12282
25K
15.53 mi12:29:111:58:427:3819:25
8:00
#12532
30K
18.64 mi12:54:252:23:567:4325:14
8:07
#12441
20M
20.00 mi13:05:332:35:047:4511:08
8:12
#12358
21M
21.00 mi13:14:112:43:427:488:38
8:38
#12269
35K
21.75 mi13:20:062:49:377:485:55
7:55
#12220
23M
23.00 mi13:30:062:59:377:4910:00
7:59
#12038
24M
24.00 mi13:38:003:07:317:497:54
7:54
#11951
40K
24.85 mi13:44:473:14:187:496:47
7:56
#11840
25.2M
25.20 mi13:47:433:17:147:502:56
8:30
#11779
Finish
26.22 mi13:55:163:24:477:497:33
7:25
#11613
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi124823059305911815(Top 42%)2809(Top 23%)2809(Top 51%)
10K6.21 mi3.10 mi12775-2933215-1563215-15613197(Top 46%)3491(Top 29%)3491(Top 64%)
15K9.32 mi3.11 mi12428+3473066+1493066+14911815(Top 42%)2809(Top 23%)2809(Top 51%)
20K12.43 mi3.11 mi12252+1763007+593007+5911838(Top 42%)2911(Top 24%)2911(Top 53%)
Half13.11 mi0.68 mi12282-303028-213028-2112796(Top 45%)3375(Top 28%)3375(Top 62%)
25K15.53 mi2.42 mi12532-2503210-1823210-18213958(Top 49%)4180(Top 34%)4180(Top 76%)
30K18.64 mi3.11 mi12441+913236-263236-2612252(Top 43%)3414(Top 28%)3414(Top 62%)
20M20.00 mi1.36 mi12358+833226+103226+1011766(Top 41%)3332(Top 27%)3332(Top 61%)
21M21.00 mi1.00 mi12269+893217+93217+911303(Top 40%)3245(Top 27%)3245(Top 59%)
35K21.75 mi0.75 mi12220+493217321711659(Top 41%)3461(Top 28%)3461(Top 63%)
23M23.00 mi1.25 mi12038+1823153+643153+649955(Top 35%)2722(Top 22%)2722(Top 50%)
24M24.00 mi1.00 mi11951+873144+93144+910568(Top 37%)3079(Top 25%)3079(Top 56%)
40K24.85 mi0.85 mi11840+1113124+203124+209739(Top 34%)2798(Top 23%)2798(Top 51%)
25.2M25.20 mi0.35 mi11779+613106+183106+188910(Top 31%)2494(Top 20%)2494(Top 46%)
Finish26.22 mi1.02 mi11613+1663063+433063+438598(Top 30%)2345(Top 19%)2345(Top 43%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 42%
×21story building
+97ft-345ft

Overall

11815

Females

2809

F18-39

2809

5K→10K

3.1 - 6.2 mi

Top 46%
×5story building
+79ft-138ft

Overall

13197

Females

3491

F18-39

3491

10K→15K

6.2 - 9.3 mi

Top 42%
×3story building
+67ft-78ft

Overall

11815

Females

2809

F18-39

2809

15K→20K

9.3 - 12.4 mi

Top 42%
×5story building
+106ft-86ft

Overall

11838

Females

2911

F18-39

2911

20K→Half

12.4 - 13.1 mi

Top 45%
×2story building
+19ft-37ft

Overall

12796

Females

3375

F18-39

3375

Half→25K

13.1 - 15.5 mi

Top 49%
×4story building
+66ft-88ft

Overall

13958

Females

4180

F18-39

4180

25K→30K

15.5 - 18.6 mi

Top 43%
×9story building
+181ft-148ft

Overall

12252

Females

3414

F18-39

3414

30K→20M

18.6 - 20.0 mi

Top 41%
×5story building
+64ft-50ft

Overall

11766

Females

3332

F18-39

3332

20M→21M

20.0 - 21.0 mi

Top 40%
×8story building
+106ft-24ft

Overall

11303

Females

3245

F18-39

3245

21M→35K

21.0 - 21.8 mi

Top 41%
×7story building
+17ft-86ft

Overall

11659

Females

3461

F18-39

3461

35K→23M

21.8 - 23.0 mi

Top 35%
×5story building
+23ft-63ft

Overall

9955

Females

2722

F18-39

2722

23M→24M

23.0 - 24.0 mi

Top 37%
×6story building
+12ft-82ft

Overall

10568

Females

3079

F18-39

3079

24M→40K

24.0 - 24.9 mi

Top 34%
×1story
+6ft-20ft

Overall

9739

Females

2798

F18-39

2798

40K→25.2M

24.9 - 25.2 mi

Top 31%
×1story
+13ft-16ft

Overall

8910

Females

2494

F18-39

2494

25.2M→Finish

25.2 - 26.2 mi

Top 30%
×2story building
+22ft-21ft

Overall

8598

Females

2345

F18-39

2345

Passing Analysis

Category:
Athletes Passed
2336
Passed By
1467
Net Change
+869
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#12482
5K → 10K167460-293#12482#12775
10K → 15K41063+347#12775#12428
15K → 20K278102+176#12428#12252
20K → Half1545-30#12252#12282
Half → 25K92342-250#12282#12532
25K → 30K274183+91#12532#12441
30K → 20M15370+83#12441#12358
20M → 21M14657+89#12358#12269
21M → 35K8334+49#12269#12220
35K → 23M20624+182#12220#12038
23M → 24M11932+87#12038#11951
24M → 40K13827+111#11951#11840
40K → 25.2M7110+61#11840#11779
25.2M → Finish18418+166#11779#11613
TOTALS23361467+869
📊

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