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BOSTON MARATHON 2025

Kirsti Demarco

Bib: 26014•F

NY

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

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
11:19/mi
35:09
↑ 97↓ 3451.5%
10K· 6.21 mi
11:26/mi
1:10:41
↑ 79↓ 1380.4%
15K· 9.32 mi
13:06/mi
1:51:24
↑ 67↓ 78
20K· 12.43 mi
12:20/mi
2:29:44
↑ 106↓ 860.1%
Half· 13.11 mi
11:55/mi
2:37:52
↑ 19↓ 370.5%
25K· 15.53 mi
13:47/mi
3:11:16
↑ 66↓ 880.2%
30K· 18.64 mi
14:10/mi
3:55:16
↑ 181↓ 1480.2%
20M
12:56/mi
4:12:51
↑ 64↓ 500.2%
21M
13:04/mi
4:25:55
↑ 106↓ 241.6%
35K· 21.75 mi
11:43/mi
4:34:41
↑ 17↓ 861.7%
23M
12:50/mi
4:50:45
↑ 23↓ 630.6%
24M
11:56/mi
5:02:41
↓ 821.3%
40K· 24.85 mi
13:08/mi
5:13:55
↓ 200.3%
25.2M
12:48/mi
5:18:20
↑ 13↓ 160.2%
Finish· 26.22 mi
11:09/mi
5:29:42
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:37:52
Pace12:03 /mi
2nd Half
Distance13.11 mi
Time2:51:50
Pace13:06 /mi
📊Positive Split: 8.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:55:0035:0911:1935:09
11:19
-
10K
6.21 mi12:30:321:10:4111:2335:32
11:26
+0:07
15K
9.32 mi13:11:151:51:2411:5740:43
13:06
+1:40
20K
12.43 mi13:49:352:29:4412:0338:20
12:20
-0:46
Half
13.11 mi13:57:432:37:5212:038:08
11:55
-0:25
25K
15.53 mi14:31:073:11:1612:1933:24
13:47
+1:52
30K
18.64 mi15:15:073:55:1612:3744:00
14:10
+0:23
20M
20.00 mi15:32:424:12:5112:3917:35
12:56
-1:14
21M
21.00 mi15:45:464:25:5512:4013:04
13:04
+0:08
35K
21.75 mi15:54:324:34:4112:388:46
11:43
-1:21
23M
23.00 mi16:10:364:50:4512:3816:04
12:50
+1:07
24M
24.00 mi16:22:325:02:4112:3711:56
11:56
-0:54
40K
24.85 mi16:33:465:13:5512:3811:14
13:08
+1:12
25.2M
25.20 mi16:38:115:18:2012:384:25
12:48
-0:20
Finish
26.22 mi16:49:335:29:4212:3511:22
11:09
-1:39

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

11:09 /mi

Average Pace

12:35 /mi

Slowest Pace

14:10 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:29:13

45% of race

Time at Steady Pace

1:43:05

31% of race

Time at Slower Pace

1:17:24

23% of race

Average Pace: 12:34 /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 mi11:55:0035:0911:1935:09
11:19
#27857
10K
6.21 mi12:30:321:10:4111:2335:32
11:26
#27710
15K
9.32 mi13:11:151:51:2411:5740:43
13:06
#27979
20K
12.43 mi13:49:352:29:4412:0338:20
12:20
#27858
Half
13.11 mi13:57:432:37:5212:038:08
11:55
#27832
25K
15.53 mi14:31:073:11:1612:1933:24
13:47
#27835
30K
18.64 mi15:15:073:55:1612:3744:00
14:10
#27819
20M
20.00 mi15:32:424:12:5112:3917:35
12:56
#27734
21M
21.00 mi15:45:464:25:5512:4013:04
13:04
#27636
35K
21.75 mi15:54:324:34:4112:388:46
11:43
#27599
23M
23.00 mi16:10:364:50:4512:3816:04
12:50
#27539
24M
24.00 mi16:22:325:02:4112:3711:56
11:56
#27499
40K
24.85 mi16:33:465:13:5512:3811:14
13:08
#27480
25.2M
25.20 mi16:38:115:18:2012:384:25
12:48
#27456
Finish
26.22 mi16:49:335:29:4212:3511:22
11:09
#27415
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi27857118721187228200(Top 99%)12110(Top 99%)12110(Top 221%)
10K6.21 mi3.10 mi27710+14711775+9711775+9727536(Top 97%)11690(Top 96%)11690(Top 214%)
15K9.32 mi3.11 mi27979-26911956-18111956-18128200(Top 99%)12110(Top 99%)12110(Top 221%)
20K12.43 mi3.11 mi27858+12111887+6911887+6927389(Top 96%)11635(Top 95%)11635(Top 213%)
Half13.11 mi0.68 mi27832+2611870+1711870+1727393(Top 96%)11644(Top 95%)11644(Top 213%)
25K15.53 mi2.42 mi27835-311878-811878-827775(Top 98%)11875(Top 97%)11875(Top 217%)
30K18.64 mi3.11 mi27819+1611881-311881-327623(Top 97%)11848(Top 97%)11848(Top 217%)
20M20.00 mi1.36 mi27734+8511841+4011841+4026383(Top 93%)11218(Top 92%)11218(Top 205%)
21M21.00 mi1.00 mi27636+9811794+4711794+4725119(Top 88%)10627(Top 87%)10627(Top 194%)
35K21.75 mi0.75 mi27599+3711776+1811776+1825425(Top 90%)10814(Top 88%)10814(Top 198%)
23M23.00 mi1.25 mi27539+6011744+3211744+3226189(Top 92%)11193(Top 92%)11193(Top 205%)
24M24.00 mi1.00 mi27499+4011725+1911725+1925583(Top 90%)10926(Top 89%)10926(Top 200%)
40K24.85 mi0.85 mi27480+1911713+1211713+1226415(Top 93%)11341(Top 93%)11341(Top 207%)
25.2M25.20 mi0.35 mi27456+2411700+1311700+1324727(Top 87%)10545(Top 86%)10545(Top 193%)
Finish26.22 mi1.02 mi27415+4111682+1811682+1825629(Top 90%)10976(Top 90%)10976(Top 201%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 99%
×21story building
+97ft-345ft

Overall

28200

Females

12110

F18-39

12110

5K→10K

3.1 - 6.2 mi

Top 97%
×5story building
+79ft-138ft

Overall

27536

Females

11690

F18-39

11690

10K→15K

6.2 - 9.3 mi

Top 99%
×3story building
+67ft-78ft

Overall

28200

Females

12110

F18-39

12110

15K→20K

9.3 - 12.4 mi

Top 96%
×5story building
+106ft-86ft

Overall

27389

Females

11635

F18-39

11635

20K→Half

12.4 - 13.1 mi

Top 96%
×2story building
+19ft-37ft

Overall

27393

Females

11644

F18-39

11644

Half→25K

13.1 - 15.5 mi

Top 98%
×4story building
+66ft-88ft

Overall

27775

Females

11875

F18-39

11875

25K→30K

15.5 - 18.6 mi

Top 97%
×9story building
+181ft-148ft

Overall

27623

Females

11848

F18-39

11848

30K→20M

18.6 - 20.0 mi

Top 93%
×5story building
+64ft-50ft

Overall

26383

Females

11218

F18-39

11218

20M→21M

20.0 - 21.0 mi

Top 88%
×8story building
+106ft-24ft

Overall

25119

Females

10627

F18-39

10627

21M→35K

21.0 - 21.8 mi

Top 90%
×7story building
+17ft-86ft

Overall

25425

Females

10814

F18-39

10814

35K→23M

21.8 - 23.0 mi

Top 92%
×5story building
+23ft-63ft

Overall

26189

Females

11193

F18-39

11193

23M→24M

23.0 - 24.0 mi

Top 90%
×6story building
+12ft-82ft

Overall

25583

Females

10926

F18-39

10926

24M→40K

24.0 - 24.9 mi

Top 93%
×1story
+6ft-20ft

Overall

26415

Females

11341

F18-39

11341

40K→25.2M

24.9 - 25.2 mi

Top 87%
×1story
+13ft-16ft

Overall

24727

Females

10545

F18-39

10545

25.2M→Finish

25.2 - 26.2 mi

Top 90%
×2story building
+22ft-21ft

Overall

25629

Females

10976

F18-39

10976

Passing Analysis

Category:
Athletes Passed
865
Passed By
423
Net Change
+442
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#27857
5K → 10K17326+147#27857#27710
10K → 15K9278-269#27710#27979
15K → 20K1243+121#27979#27858
20K → Half326+26#27858#27832
Half → 25K4144-3#27832#27835
25K → 30K6246+16#27835#27819
30K → 20M861+85#27819#27734
20M → 21M1002+98#27734#27636
21M → 35K392+37#27636#27599
35K → 23M622+60#27599#27539
23M → 24M433+40#27539#27499
24M → 40K278+19#27499#27480
40K → 25.2M240+24#27480#27456
25.2M → Finish432+41#27456#27415
TOTALS865423+442
📊

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