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BOSTON MARATHON 2025

Kaitlin Koosman

Bib: 15637•F

OR

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 27%
Gender (Female)
#0 / 12228
Top 10%
Division (F18-39)
#0 / 5469
Top 19%
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
7:17/mi
22:37
↑ 97↓ 3451.5%
10K· 6.21 mi
7:11/mi
44:55
↑ 79↓ 1380.4%
15K· 9.32 mi
7:14/mi
1:07:23
↑ 67↓ 78
20K· 12.43 mi
7:18/mi
1:30:03
↑ 106↓ 860.1%
Half· 13.11 mi
7:12/mi
1:34:58
↑ 19↓ 370.5%
25K· 15.53 mi
7:16/mi
1:52:35
↑ 66↓ 880.2%
30K· 18.64 mi
7:26/mi
2:15:42
↑ 181↓ 1480.2%
20M
7:26/mi
2:25:48
↑ 64↓ 500.2%
21M
7:53/mi
2:33:41
↑ 106↓ 241.6%
35K· 21.75 mi
7:12/mi
2:39:04
↑ 17↓ 861.7%
23M
7:30/mi
2:48:28
↑ 23↓ 630.6%
24M
7:26/mi
2:55:54
↓ 821.3%
40K· 24.85 mi
7:33/mi
3:02:21
↓ 200.3%
25.2M
8:13/mi
3:05:11
↑ 13↓ 160.2%
Finish· 26.22 mi
7:07/mi
3:12:26
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:34:58
Pace7:15 /mi
2nd Half
Distance13.11 mi
Time1:37:28
Pace7:26 /mi
📊Positive Split: 2.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:54:4322:377:1722:37
7:17
-
10K
6.21 mi11:17:0144:557:1422:18
7:11
-0:06
15K
9.32 mi11:39:291:07:237:1422:28
7:14
+0:03
20K
12.43 mi12:02:091:30:037:1522:40
7:18
+0:04
Half
13.11 mi12:07:041:34:587:154:55
7:12
-0:06
25K
15.53 mi12:24:411:52:357:1517:37
7:16
+0:04
30K
18.64 mi12:47:482:15:427:1723:07
7:26
+0:10
20M
20.00 mi12:57:542:25:487:1710:06
7:26
0:00
21M
21.00 mi13:05:472:33:417:197:53
7:53
+0:27
35K
21.75 mi13:11:102:39:047:195:23
7:12
-0:41
23M
23.00 mi13:20:342:48:287:199:24
7:30
+0:18
24M
24.00 mi13:28:002:55:547:207:26
7:26
-0:04
40K
24.85 mi13:34:273:02:217:206:27
7:33
+0:07
25.2M
25.20 mi13:37:173:05:117:212:50
8:13
+0:40
Finish
26.22 mi13:44:323:12:267:217:15
7:07
-1:06

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

7:07 /mi

Average Pace

7:21 /mi

Slowest Pace

8:13 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:01:43

94% of race

Time at Steady Pace

10:43

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:20 /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 mi10:54:4322:377:1722:37
7:17
#10164
10K
6.21 mi11:17:0144:557:1422:18
7:11
#9711
15K
9.32 mi11:39:291:07:237:1422:28
7:14
#9580
20K
12.43 mi12:02:091:30:037:1522:40
7:18
#9388
Half
13.11 mi12:07:041:34:587:154:55
7:12
#9369
25K
15.53 mi12:24:411:52:357:1517:37
7:16
#9101
30K
18.64 mi12:47:482:15:427:1723:07
7:26
#8672
20M
20.00 mi12:57:542:25:487:1710:06
7:26
#8452
21M
21.00 mi13:05:472:33:417:197:53
7:53
#8289
35K
21.75 mi13:11:102:39:047:195:23
7:12
#8177
23M
23.00 mi13:20:342:48:287:199:24
7:30
#8019
24M
24.00 mi13:28:002:55:547:207:26
7:26
#7947
40K
24.85 mi13:34:273:02:217:206:27
7:33
#7866
25.2M
25.20 mi13:37:173:05:117:212:50
8:13
#7828
Finish
26.22 mi13:44:323:12:267:217:15
7:07
#7725
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi10164187318739396(Top 33%)1598(Top 13%)1598(Top 29%)
10K6.21 mi3.10 mi9711+4531673+2001673+2009302(Top 33%)1511(Top 12%)1511(Top 28%)
15K9.32 mi3.11 mi9580+1311639+341639+349396(Top 33%)1598(Top 13%)1598(Top 29%)
20K12.43 mi3.11 mi9388+1921594+451594+459030(Top 32%)1537(Top 13%)1537(Top 28%)
Half13.11 mi0.68 mi9369+191587+71587+79173(Top 32%)1558(Top 13%)1558(Top 28%)
25K15.53 mi2.42 mi9101+2681493+941493+948118(Top 29%)1262(Top 10%)1262(Top 23%)
30K18.64 mi3.11 mi8672+4291363+1301363+1307322(Top 26%)1137(Top 9%)1137(Top 21%)
20M20.00 mi1.36 mi8452+2201311+521311+526605(Top 23%)1013(Top 8%)1013(Top 19%)
21M21.00 mi1.00 mi8289+1631278+331278+336723(Top 24%)1192(Top 10%)1192(Top 22%)
35K21.75 mi0.75 mi8177+1121257+211257+216616(Top 23%)1140(Top 9%)1140(Top 21%)
23M23.00 mi1.25 mi8019+1581249+81249+86681(Top 24%)1256(Top 10%)1256(Top 23%)
24M24.00 mi1.00 mi7947+721259-101259-107271(Top 26%)1560(Top 13%)1560(Top 29%)
40K24.85 mi0.85 mi7866+811256+31256+37071(Top 25%)1573(Top 13%)1573(Top 29%)
25.2M25.20 mi0.35 mi7828+381258-21258-27199(Top 25%)1715(Top 14%)1715(Top 31%)
Finish26.22 mi1.02 mi7725+1031248+101248+106493(Top 23%)1436(Top 12%)1436(Top 26%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 33%
×21story building
+97ft-345ft

Overall

9396

Females

1598

F18-39

1598

5K→10K

3.1 - 6.2 mi

Top 33%
×5story building
+79ft-138ft

Overall

9302

Females

1511

F18-39

1511

10K→15K

6.2 - 9.3 mi

Top 33%
×3story building
+67ft-78ft

Overall

9396

Females

1598

F18-39

1598

15K→20K

9.3 - 12.4 mi

Top 32%
×5story building
+106ft-86ft

Overall

9030

Females

1537

F18-39

1537

20K→Half

12.4 - 13.1 mi

Top 32%
×2story building
+19ft-37ft

Overall

9173

Females

1558

F18-39

1558

Half→25K

13.1 - 15.5 mi

Top 29%
×4story building
+66ft-88ft

Overall

8118

Females

1262

F18-39

1262

25K→30K

15.5 - 18.6 mi

Top 26%
×9story building
+181ft-148ft

Overall

7322

Females

1137

F18-39

1137

30K→20M

18.6 - 20.0 mi

Top 23%
×5story building
+64ft-50ft

Overall

6605

Females

1013

F18-39

1013

20M→21M

20.0 - 21.0 mi

Top 24%
×8story building
+106ft-24ft

Overall

6723

Females

1192

F18-39

1192

21M→35K

21.0 - 21.8 mi

Top 23%
×7story building
+17ft-86ft

Overall

6616

Females

1140

F18-39

1140

35K→23M

21.8 - 23.0 mi

Top 24%
×5story building
+23ft-63ft

Overall

6681

Females

1256

F18-39

1256

23M→24M

23.0 - 24.0 mi

Top 26%
×6story building
+12ft-82ft

Overall

7271

Females

1560

F18-39

1560

24M→40K

24.0 - 24.9 mi

Top 25%
×1story
+6ft-20ft

Overall

7071

Females

1573

F18-39

1573

40K→25.2M

24.9 - 25.2 mi

Top 25%
×1story
+13ft-16ft

Overall

7199

Females

1715

F18-39

1715

25.2M→Finish

25.2 - 26.2 mi

Top 23%
×2story building
+22ft-21ft

Overall

6493

Females

1436

F18-39

1436

Passing Analysis

Category:
Athletes Passed
2940*
Passed By
501
Net Change
+2439
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#10164
5K → 10K533*80+453#10164#9711
10K → 15K232101+131#9711#9580
15K → 20K27179+192#9580#9388
20K → Half3213+19#9388#9369
Half → 25K29628+268#9369#9101
25K → 30K46738+429#9101#8672
30K → 20M2288+220#8672#8452
20M → 21M18219+163#8452#8289
21M → 35K12311+112#8289#8177
35K → 23M19133+158#8177#8019
23M → 24M10331+72#8019#7947
24M → 40K10625+81#7947#7866
40K → 25.2M5719+38#7866#7828
25.2M → Finish11916+103#7828#7725
TOTALS2940*501+2439

* Includes athletes who did not complete a segment (DNF/DNQ).

📊

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