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BOSTON MARATHON 2025

Brianna Costigan

Bib: 9964•F

CO

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 12%
Gender (Female)
#0 / 12228
Top 2%
Division (F18-39)
#0 / 5469
Top 3%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
20:42
Rank: #5143
Start → 5K
20:42 | 6:40/mi
10K· 6.21 mi
41:17
Rank: #4877 (+266)
5K → 10K
20:35 | 6:38/mi
15K· 9.32 mi
1:01:53
Rank: #4712 (+165)
10K → 15K
20:36 | 6:38/mi
20K· 12.43 mi
1:22:13
Rank: #4310 (+402)
15K → 20K
20:20 | 6:33/mi
Half· 13.11 mi
1:26:33
Rank: #4192 (+118)
20K → Half
4:20 | 6:21/mi
25K· 15.53 mi
1:42:24
Rank: #3944 (+248)
Half → 25K
15:51 | 6:32/mi
30K· 18.64 mi
2:03:37
Rank: #3839 (+105)
25K → 30K
21:13 | 6:50/mi
20M
2:12:51
Rank: #3722 (+117)
30K → 20M
9:14 | 6:48/mi
21M
2:19:48
Rank: #3597 (+125)
20M → 21M
6:57 | 6:57/mi
35K· 21.75 mi
2:24:49
Rank: #3573 (+24)
21M → 35K
5:01 | 6:42/mi
23M
2:33:31
Rank: #3515 (+58)
35K → 23M
8:42 | 6:57/mi
24M
2:40:11
Rank: #3434 (+81)
23M → 24M
6:40 | 6:40/mi
40K· 24.85 mi
2:46:08
Rank: #3414 (+20)
24M → 40K
5:57 | 6:58/mi
25.2M
2:48:46
Rank: #3405 (+9)
40K → 25.2M
2:38 | 7:38/mi
Finish· 26.22 mi
2:55:22
Rank: #3332 (+73)
25.2M → Finish
6:36 | 6:29/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:26:33
Pace6:36 /mi
2nd Half
Distance13.11 mi
Time1:28:49
Pace6:47 /mi
📊Positive Split: 2.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:47:0020:426:4020:42
6:40
-
10K
6.21 mi11:07:3541:176:3920:35
6:38
-0:02
15K
9.32 mi11:28:111:01:536:3820:36
6:38
0:00
20K
12.43 mi11:48:311:22:136:3720:20
6:33
-0:05
Half
13.11 mi11:52:511:26:336:364:20
6:21
-0:12
25K
15.53 mi12:08:421:42:246:3615:51
6:32
+0:11
30K
18.64 mi12:29:552:03:376:3821:13
6:50
+0:18
20M
20.00 mi12:39:092:12:516:399:14
6:48
-0:02
21M
21.00 mi12:46:062:19:486:396:57
6:57
+0:09
35K
21.75 mi12:51:072:24:496:405:01
6:42
-0:15
23M
23.00 mi12:59:492:33:316:408:42
6:57
+0:15
24M
24.00 mi13:06:292:40:116:406:40
6:40
-0:17
40K
24.85 mi13:12:262:46:086:415:57
6:58
+0:18
25.2M
25.20 mi13:15:042:48:466:422:38
7:38
+0:40
Finish
26.22 mi13:21:402:55:226:426:36
6:29
-1:09

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

6:21 /mi

Average Pace

6:42 /mi

Slowest Pace

7:38 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

10:56

6% of race

Time at Steady Pace

1:58:59

68% of race

Time at Slower Pace

45:27

26% of race

Average Pace: 6:41 /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 mi10:47:0020:426:4020:42
6:40
#5143
10K
6.21 mi11:07:3541:176:3920:35
6:38
#4877
15K
9.32 mi11:28:111:01:536:3820:36
6:38
#4712
20K
12.43 mi11:48:311:22:136:3720:20
6:33
#4310
Half
13.11 mi11:52:511:26:336:364:20
6:21
#4192
25K
15.53 mi12:08:421:42:246:3615:51
6:32
#3944
30K
18.64 mi12:29:552:03:376:3821:13
6:50
#3839
20M
20.00 mi12:39:092:12:516:399:14
6:48
#3722
21M
21.00 mi12:46:062:19:486:396:57
6:57
#3597
35K
21.75 mi12:51:072:24:496:405:01
6:42
#3573
23M
23.00 mi12:59:492:33:316:408:42
6:57
#3515
24M
24.00 mi13:06:292:40:116:406:40
6:40
#3434
40K
24.85 mi13:12:262:46:086:415:57
6:58
#3414
25.2M
25.20 mi13:15:042:48:466:422:38
7:38
#3405
Finish
26.22 mi13:21:402:55:226:426:36
6:29
#3332
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi51433373374522(Top 16%)276(Top 2%)276(Top 5%)
10K6.21 mi3.10 mi4877+266311+26311+264680(Top 16%)290(Top 2%)290(Top 5%)
15K9.32 mi3.11 mi4712+165294+17294+174522(Top 16%)276(Top 2%)276(Top 5%)
20K12.43 mi3.11 mi4310+402252+42252+423396(Top 12%)172(Top 1%)172(Top 3%)
Half13.11 mi0.68 mi4192+118242+10242+102860(Top 10%)125(Top 1%)125(Top 2%)
25K15.53 mi2.42 mi3944+248224+18224+183103(Top 11%)156(Top 1%)156(Top 3%)
30K18.64 mi3.11 mi3839+105214+10214+103637(Top 13%)256(Top 2%)256(Top 5%)
20M20.00 mi1.36 mi3722+117209+5209+52922(Top 10%)185(Top 2%)185(Top 3%)
21M21.00 mi1.00 mi3597+125202+7202+72097(Top 7%)124(Top 1%)124(Top 2%)
35K21.75 mi0.75 mi3573+24201+1201+13596(Top 13%)320(Top 3%)320(Top 6%)
23M23.00 mi1.25 mi3515+58202-1202-13490(Top 12%)309(Top 3%)309(Top 6%)
24M24.00 mi1.00 mi3434+81197+5197+52836(Top 10%)229(Top 2%)229(Top 4%)
40K24.85 mi0.85 mi3414+20201-4201-43690(Top 13%)420(Top 3%)420(Top 8%)
25.2M25.20 mi0.35 mi3405+9202-1202-14095(Top 14%)573(Top 5%)573(Top 10%)
Finish26.22 mi1.02 mi3332+73203-1203-12735(Top 10%)265(Top 2%)265(Top 5%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 16%
×21stories
+97ft-345ft

Overall

4522

Females

276

F18-39

276

5K→10K

3.1 - 6.2 mi

Top 16%
×5stories
+79ft-138ft

Overall

4680

Females

290

F18-39

290

10K→15K

6.2 - 9.3 mi

Top 16%
×3stories
+67ft-78ft

Overall

4522

Females

276

F18-39

276

15K→20K

9.3 - 12.4 mi

Top 12%
×5stories
+106ft-86ft

Overall

3396

Females

172

F18-39

172

20K→Half

12.4 - 13.1 mi

Top 10%
×2stories
+19ft-37ft

Overall

2860

Females

125

F18-39

125

Half→25K

13.1 - 15.5 mi

Top 11%
×4stories
+66ft-88ft

Overall

3103

Females

156

F18-39

156

25K→30K

15.5 - 18.6 mi

Top 13%
×9stories
+181ft-148ft

Overall

3637

Females

256

F18-39

256

30K→20M

18.6 - 20.0 mi

Top 10%
×5stories
+64ft-50ft

Overall

2922

Females

185

F18-39

185

20M→21M

20.0 - 21.0 mi

Top 7%
×8stories
+106ft-24ft

Overall

2097

Females

124

F18-39

124

21M→35K

21.0 - 21.8 mi

Top 13%
×7stories
+17ft-86ft

Overall

3596

Females

320

F18-39

320

35K→23M

21.8 - 23.0 mi

Top 12%
×5stories
+23ft-63ft

Overall

3490

Females

309

F18-39

309

23M→24M

23.0 - 24.0 mi

Top 10%
×6stories
+12ft-82ft

Overall

2836

Females

229

F18-39

229

24M→40K

24.0 - 24.9 mi

Top 13%
×1story
+6ft-20ft

Overall

3690

Females

420

F18-39

420

40K→25.2M

24.9 - 25.2 mi

Top 14%
×1story
+13ft-16ft

Overall

4095

Females

573

F18-39

573

25.2M→Finish

25.2 - 26.2 mi

Top 10%
×2stories
+22ft-21ft

Overall

2735

Females

265

F18-39

265

Passing Analysis

Category:
Athletes Passed
2126
Passed By
315
Net Change
+1811
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#5143
5K → 10K33771+266#5143#4877
10K → 15K20641+165#4877#4712
15K → 20K4020+402#4712#4310
20K → Half1191+118#4310#4192
Half → 25K2502+248#4192#3944
25K → 30K16560+105#3944#3839
30K → 20M12912+117#3839#3722
20M → 21M1272+125#3722#3597
21M → 35K4521+24#3597#3573
35K → 23M9032+58#3573#3515
23M → 24M9615+81#3515#3434
24M → 40K5232+20#3434#3414
40K → 25.2M2112+9#3414#3405
25.2M → Finish8714+73#3405#3332
TOTALS2126315+1811
📊

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