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BOSTON MARATHON 2025

Karen Thomas

Bib: 18959•F

IL

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

Start
0:00:00
Race begins
5K· 3.11 mi
29:40
Rank: #24405
Start → 5K
29:40 | 9:33/mi
10K· 6.21 mi
57:48
Rank: #23573 (+832)
5K → 10K
28:08 | 9:03/mi
15K· 9.32 mi
1:25:40
Rank: #23064 (+509)
10K → 15K
27:52 | 8:58/mi
20K· 12.43 mi
1:53:37
Rank: #22541 (+523)
15K → 20K
27:57 | 9:00/mi
Half· 13.11 mi
1:59:38
Rank: #22452 (+89)
20K → Half
6:01 | 8:49/mi
25K· 15.53 mi
2:22:23
Rank: #22312 (+140)
Half → 25K
22:45 | 9:23/mi
30K· 18.64 mi
2:53:41
Rank: #22222 (+90)
25K → 30K
31:18 | 10:04/mi
20M
3:07:44
Rank: #22207 (+15)
30K → 20M
14:03 | 10:20/mi
21M
3:18:36
Rank: #22112 (+95)
20M → 21M
10:52 | 10:52/mi
35K· 21.75 mi
3:25:17
Rank: #21960 (+152)
21M → 35K
6:41 | 8:56/mi
23M
3:37:00
Rank: #21740 (+220)
35K → 23M
11:43 | 9:21/mi
24M
3:46:27
Rank: #21640 (+100)
23M → 24M
9:27 | 9:27/mi
40K· 24.85 mi
3:54:19
Rank: #21485 (+155)
24M → 40K
7:52 | 9:12/mi
25.2M
3:58:09
Rank: #21466 (+19)
40K → 25.2M
3:50 | 11:07/mi
Finish· 26.22 mi
4:07:10
Rank: #21367 (+99)
25.2M → Finish
9:01 | 8:51/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:59:38
Pace9:08 /mi
2nd Half
Distance13.11 mi
Time2:07:32
Pace9:44 /mi
📊Positive Split: 6.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:46:0929:409:3329:40
9:33
-
10K
6.21 mi12:14:1757:489:1828:08
9:03
-0:30
15K
9.32 mi12:42:091:25:409:1127:52
8:58
-0:05
20K
12.43 mi13:10:061:53:379:0927:57
9:00
+0:02
Half
13.11 mi13:16:071:59:389:086:01
8:49
-0:11
25K
15.53 mi13:38:522:22:239:1022:45
9:23
+0:34
30K
18.64 mi14:10:102:53:419:1931:18
10:04
+0:41
20M
20.00 mi14:24:133:07:449:2314:03
10:20
+0:16
21M
21.00 mi14:35:053:18:369:2710:52
10:52
+0:32
35K
21.75 mi14:41:463:25:179:266:41
8:56
-1:56
23M
23.00 mi14:53:293:37:009:2611:43
9:21
+0:25
24M
24.00 mi15:02:563:46:279:269:27
9:27
+0:06
40K
24.85 mi15:10:483:54:199:267:52
9:12
-0:15
25.2M
25.20 mi15:14:383:58:099:273:50
11:07
+1:55
Finish
26.22 mi15:23:394:07:109:269:01
8:51
-2:16

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

8:49 /mi

Average Pace

9:26 /mi

Slowest Pace

11:07 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

49:35

20% of race

Time at Steady Pace

2:17:32

56% of race

Time at Slower Pace

1:00:03

24% of race

Average Pace: 9:26 /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 mi11:46:0929:409:3329:40
9:33
#24405
10K
6.21 mi12:14:1757:489:1828:08
9:03
#23573
15K
9.32 mi12:42:091:25:409:1127:52
8:58
#23064
20K
12.43 mi13:10:061:53:379:0927:57
9:00
#22541
Half
13.11 mi13:16:071:59:389:086:01
8:49
#22452
25K
15.53 mi13:38:522:22:239:1022:45
9:23
#22312
30K
18.64 mi14:10:102:53:419:1931:18
10:04
#22222
20M
20.00 mi14:24:133:07:449:2314:03
10:20
#22207
21M
21.00 mi14:35:053:18:369:2710:52
10:52
#22112
35K
21.75 mi14:41:463:25:179:266:41
8:56
#21960
23M
23.00 mi14:53:293:37:009:2611:43
9:21
#21740
24M
24.00 mi15:02:563:46:279:269:27
9:27
#21640
40K
24.85 mi15:10:483:54:199:267:52
9:12
#21485
25.2M
25.20 mi15:14:383:58:099:273:50
11:07
#21466
Finish
26.22 mi15:23:394:07:109:269:01
8:51
#21367
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi244059905990521909(Top 77%)8493(Top 69%)8493(Top 155%)
10K6.21 mi3.10 mi23573+8329468+4379468+43722626(Top 80%)8935(Top 73%)8935(Top 163%)
15K9.32 mi3.11 mi23064+5099164+3049164+30421909(Top 77%)8493(Top 69%)8493(Top 155%)
20K12.43 mi3.11 mi22541+5238880+2848880+28420958(Top 74%)8033(Top 66%)8033(Top 147%)
Half13.11 mi0.68 mi22452+898842+388842+3821044(Top 74%)8077(Top 66%)8077(Top 148%)
25K15.53 mi2.42 mi22312+1408766+768766+7621494(Top 76%)8357(Top 68%)8357(Top 153%)
30K18.64 mi3.11 mi22222+908746+208746+2021809(Top 77%)8673(Top 71%)8673(Top 159%)
20M20.00 mi1.36 mi22207+158757-118757-1121983(Top 77%)8880(Top 73%)8880(Top 162%)
21M21.00 mi1.00 mi22112+958727+308727+3021053(Top 74%)8474(Top 69%)8474(Top 155%)
35K21.75 mi0.75 mi21960+1528660+678660+6717972(Top 63%)6898(Top 56%)6898(Top 126%)
23M23.00 mi1.25 mi21740+2208569+918569+9118080(Top 64%)7029(Top 57%)7029(Top 129%)
24M24.00 mi1.00 mi21640+1008536+338536+3319463(Top 69%)7813(Top 64%)7813(Top 143%)
40K24.85 mi0.85 mi21485+1558464+728464+7217399(Top 61%)6817(Top 56%)6817(Top 125%)
25.2M25.20 mi0.35 mi21466+198462+28462+221023(Top 74%)8667(Top 71%)8667(Top 158%)
Finish26.22 mi1.02 mi21367+998427+358427+3518320(Top 64%)7258(Top 59%)7258(Top 133%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 77%
×21stories
+97ft-345ft

Overall

21909

Females

8493

F18-39

8493

5K→10K

3.1 - 6.2 mi

Top 80%
×5stories
+79ft-138ft

Overall

22626

Females

8935

F18-39

8935

10K→15K

6.2 - 9.3 mi

Top 77%
×3stories
+67ft-78ft

Overall

21909

Females

8493

F18-39

8493

15K→20K

9.3 - 12.4 mi

Top 74%
×5stories
+106ft-86ft

Overall

20958

Females

8033

F18-39

8033

20K→Half

12.4 - 13.1 mi

Top 74%
×2stories
+19ft-37ft

Overall

21044

Females

8077

F18-39

8077

Half→25K

13.1 - 15.5 mi

Top 76%
×4stories
+66ft-88ft

Overall

21494

Females

8357

F18-39

8357

25K→30K

15.5 - 18.6 mi

Top 77%
×9stories
+181ft-148ft

Overall

21809

Females

8673

F18-39

8673

30K→20M

18.6 - 20.0 mi

Top 77%
×5stories
+64ft-50ft

Overall

21983

Females

8880

F18-39

8880

20M→21M

20.0 - 21.0 mi

Top 74%
×8stories
+106ft-24ft

Overall

21053

Females

8474

F18-39

8474

21M→35K

21.0 - 21.8 mi

Top 63%
×7stories
+17ft-86ft

Overall

17972

Females

6898

F18-39

6898

35K→23M

21.8 - 23.0 mi

Top 64%
×5stories
+23ft-63ft

Overall

18080

Females

7029

F18-39

7029

23M→24M

23.0 - 24.0 mi

Top 69%
×6stories
+12ft-82ft

Overall

19463

Females

7813

F18-39

7813

24M→40K

24.0 - 24.9 mi

Top 61%
×1story
+6ft-20ft

Overall

17399

Females

6817

F18-39

6817

40K→25.2M

24.9 - 25.2 mi

Top 74%
×1story
+13ft-16ft

Overall

21023

Females

8667

F18-39

8667

25.2M→Finish

25.2 - 26.2 mi

Top 64%
×2stories
+22ft-21ft

Overall

18320

Females

7258

F18-39

7258

Passing Analysis

Category:
Athletes Passed
3466
Passed By
428
Net Change
+3038
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#24405
5K → 10K86230+832#24405#23573
10K → 15K53122+509#23573#23064
15K → 20K53310+523#23064#22541
20K → Half945+89#22541#22452
Half → 25K21070+140#22452#22312
25K → 30K232142+90#22312#22222
30K → 20M8267+15#22222#22207
20M → 21M13439+95#22207#22112
21M → 35K1520+152#22112#21960
35K → 23M2266+220#21960#21740
23M → 24M11010+100#21740#21640
24M → 40K1594+155#21640#21485
40K → 25.2M3415+19#21485#21466
25.2M → Finish1078+99#21466#21367
TOTALS3466428+3038
📊

Passing Visuals

Category:
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🔥Passing Intensity

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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