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BOSTON MARATHON 2025

Katie Larson

Bib: 8744•F

CO

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 26%
Gender (Female)
#0 / 12228
Top 9%
Division (F18-39)
#0 / 5469
Top 18%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
22:39
Rank: #10238
Start → 5K
22:39 | 7:17/mi
10K· 6.21 mi
45:21
Rank: #10320 (-82)
5K → 10K
22:42 | 7:18/mi
15K· 9.32 mi
1:07:50
Rank: #10008 (+312)
10K → 15K
22:29 | 7:14/mi
20K· 12.43 mi
1:30:22
Rank: #9605 (+403)
15K → 20K
22:32 | 7:15/mi
Half· 13.11 mi
1:35:18
Rank: #9588 (+17)
20K → Half
4:56 | 7:14/mi
25K· 15.53 mi
1:52:56
Rank: #9313 (+275)
Half → 25K
17:38 | 7:16/mi
30K· 18.64 mi
2:16:08
Rank: #8855 (+458)
25K → 30K
23:12 | 7:28/mi
20M
2:26:14
Rank: #8618 (+237)
30K → 20M
10:06 | 7:26/mi
21M
2:34:02
Rank: #8417 (+201)
20M → 21M
7:48 | 7:48/mi
35K· 21.75 mi
2:39:29
Rank: #8335 (+82)
21M → 35K
5:27 | 7:17/mi
23M
2:48:36
Rank: #8060 (+275)
35K → 23M
9:07 | 7:17/mi
24M
2:55:32
Rank: #7829 (+231)
23M → 24M
6:56 | 6:56/mi
40K· 24.85 mi
3:01:37
Rank: #7634 (+195)
24M → 40K
6:05 | 7:07/mi
25.2M
3:04:18
Rank: #7566 (+68)
40K → 25.2M
2:41 | 7:47/mi
Finish· 26.22 mi
3:11:25
Rank: #7447 (+119)
25.2M → Finish
7:07 | 6:59/mi

The Course

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Half Splits

1st Half· via Half⚖️ Balanced
Distance13.11 mi
Time1:35:18
Pace7:16 /mi
2nd Half⚖️ Balanced
Distance13.11 mi
Time1:36:07
Pace7:20 /mi
📊Even Split: Consistent pacing between halves

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:48:2122:397:1722:39
7:17
-
10K
6.21 mi11:11:0345:217:1822:42
7:18
+0:01
15K
9.32 mi11:33:321:07:507:1722:29
7:14
-0:04
20K
12.43 mi11:56:041:30:227:1622:32
7:15
+0:01
Half
13.11 mi12:01:001:35:187:164:56
7:14
-0:01
25K
15.53 mi12:18:381:52:567:1617:38
7:16
+0:02
30K
18.64 mi12:41:502:16:087:1823:12
7:28
+0:12
20M
20.00 mi12:51:562:26:147:1910:06
7:26
-0:02
21M
21.00 mi12:59:442:34:027:207:48
7:48
+0:22
35K
21.75 mi13:05:112:39:297:205:27
7:17
-0:31
23M
23.00 mi13:14:182:48:367:209:07
7:17
0:00
24M
24.00 mi13:21:142:55:327:196:56
6:56
-0:21
40K
24.85 mi13:27:193:01:377:186:05
7:07
+0:11
25.2M
25.20 mi13:30:003:04:187:192:41
7:47
+0:40
Finish
26.22 mi13:37:073:11:257:187:07
6:59
-0:48

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

6:56 /mi

Average Pace

7:18 /mi

Slowest Pace

7:48 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:00:56

95% of race

Time at Steady Pace

10:29

5% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:18 /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 mi10:48:2122:397:1722:39
7:17
#10238
10K
6.21 mi11:11:0345:217:1822:42
7:18
#10320
15K
9.32 mi11:33:321:07:507:1722:29
7:14
#10008
20K
12.43 mi11:56:041:30:227:1622:32
7:15
#9605
Half
13.11 mi12:01:001:35:187:164:56
7:14
#9588
25K
15.53 mi12:18:381:52:567:1617:38
7:16
#9313
30K
18.64 mi12:41:502:16:087:1823:12
7:28
#8855
20M
20.00 mi12:51:562:26:147:1910:06
7:26
#8618
21M
21.00 mi12:59:442:34:027:207:48
7:48
#8417
35K
21.75 mi13:05:112:39:297:205:27
7:17
#8335
23M
23.00 mi13:14:182:48:367:209:07
7:17
#8060
24M
24.00 mi13:21:142:55:327:196:56
6:56
#7829
40K
24.85 mi13:27:193:01:377:186:05
7:07
#7634
25.2M
25.20 mi13:30:003:04:187:192:41
7:47
#7566
Finish
26.22 mi13:37:073:11:257:187:07
6:59
#7447
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi10238192819289410(Top 33%)1612(Top 13%)1612(Top 29%)
10K6.21 mi3.10 mi10320-821968-401968-4010378(Top 37%)2006(Top 16%)2006(Top 37%)
15K9.32 mi3.11 mi10008+3121846+1221846+1229410(Top 33%)1612(Top 13%)1612(Top 29%)
20K12.43 mi3.11 mi9605+4031691+1551691+1558624(Top 30%)1368(Top 11%)1368(Top 25%)
Half13.11 mi0.68 mi9588+171693-21693-29247(Top 33%)1629(Top 13%)1629(Top 30%)
25K15.53 mi2.42 mi9313+2751591+1021591+1028129(Top 29%)1272(Top 10%)1272(Top 23%)
30K18.64 mi3.11 mi8855+4581447+1441447+1447500(Top 26%)1207(Top 10%)1207(Top 22%)
20M20.00 mi1.36 mi8618+2371387+601387+606552(Top 23%)996(Top 8%)996(Top 18%)
21M21.00 mi1.00 mi8417+2011338+491338+496140(Top 22%)983(Top 8%)983(Top 18%)
35K21.75 mi0.75 mi8335+821321+171321+177060(Top 25%)1330(Top 11%)1330(Top 24%)
23M23.00 mi1.25 mi8060+2751269+521269+525305(Top 19%)776(Top 6%)776(Top 14%)
24M24.00 mi1.00 mi7829+2311216+531216+534219(Top 15%)507(Top 4%)507(Top 9%)
40K24.85 mi0.85 mi7634+1951177+391177+394508(Top 16%)655(Top 5%)655(Top 12%)
25.2M25.20 mi0.35 mi7566+681169+81169+84643(Top 16%)788(Top 6%)788(Top 14%)
Finish26.22 mi1.02 mi7447+1191157+121157+125582(Top 20%)1108(Top 9%)1108(Top 20%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 33%
×21stories
+97ft-345ft

Overall

9410

Females

1612

F18-39

1612

5K→10K

3.1 - 6.2 mi

Top 37%
×5stories
+79ft-138ft

Overall

10378

Females

2006

F18-39

2006

10K→15K

6.2 - 9.3 mi

Top 33%
×3stories
+67ft-78ft

Overall

9410

Females

1612

F18-39

1612

15K→20K

9.3 - 12.4 mi

Top 30%
×5stories
+106ft-86ft

Overall

8624

Females

1368

F18-39

1368

20K→Half

12.4 - 13.1 mi

Top 33%
×2stories
+19ft-37ft

Overall

9247

Females

1629

F18-39

1629

Half→25K

13.1 - 15.5 mi

Top 29%
×4stories
+66ft-88ft

Overall

8129

Females

1272

F18-39

1272

25K→30K

15.5 - 18.6 mi

Top 26%
×9stories
+181ft-148ft

Overall

7500

Females

1207

F18-39

1207

30K→20M

18.6 - 20.0 mi

Top 23%
×5stories
+64ft-50ft

Overall

6552

Females

996

F18-39

996

20M→21M

20.0 - 21.0 mi

Top 22%
×8stories
+106ft-24ft

Overall

6140

Females

983

F18-39

983

21M→35K

21.0 - 21.8 mi

Top 25%
×7stories
+17ft-86ft

Overall

7060

Females

1330

F18-39

1330

35K→23M

21.8 - 23.0 mi

Top 19%
×5stories
+23ft-63ft

Overall

5305

Females

776

F18-39

776

23M→24M

23.0 - 24.0 mi

Top 15%
×6stories
+12ft-82ft

Overall

4219

Females

507

F18-39

507

24M→40K

24.0 - 24.9 mi

Top 16%
×1story
+6ft-20ft

Overall

4508

Females

655

F18-39

655

40K→25.2M

24.9 - 25.2 mi

Top 16%
×1story
+13ft-16ft

Overall

4643

Females

788

F18-39

788

25.2M→Finish

25.2 - 26.2 mi

Top 20%
×2stories
+22ft-21ft

Overall

5582

Females

1108

F18-39

1108

Passing Analysis

Category:
Athletes Passed
3318*
Passed By
527
Net Change
+2791
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#10238
5K → 10K223305-82#10238#10320
10K → 15K36351+312#10320#10008
15K → 20K424*21+403#10008#9605
20K → Half3720+17#9605#9588
Half → 25K29621+275#9588#9313
25K → 30K49335+458#9313#8855
30K → 20M24710+237#8855#8618
20M → 21M21312+201#8618#8417
21M → 35K9816+82#8417#8335
35K → 23M28510+275#8335#8060
23M → 24M2332+231#8060#7829
24M → 40K2016+195#7829#7634
40K → 25.2M713+68#7634#7566
25.2M → Finish13415+119#7566#7447
TOTALS3318*527+2791

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

📊

Passing Visuals

Category:

📈Position Graph

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🎨Heatmap Timeline

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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