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BOSTON MARATHON 2025

Caitlin Nicholson

Bib: 14410•F

MD

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 36%
Gender (Female)
#0 / 12228
Top 19%
Division (F18-39)
#0 / 5469
Top 32%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
23:45
Rank: #13477
Start → 5K
7:39/mi
23:45 split
10K· 6.21 mi
47:30
Rank: #13438 (+39)
5K → 10K
7:39/mi
23:45 split
15K· 9.32 mi
1:10:25
Rank: #12473 (+965)
10K → 15K
7:23/mi
22:55 split
20K· 12.43 mi
1:33:10
Rank: #11607 (+866)
15K → 20K
7:19/mi
22:45 split
Half· 13.11 mi
1:38:00
Rank: #11437 (+170)
20K → Half
7:05/mi
4:50 split
25K· 15.53 mi
1:55:36
Rank: #10823 (+614)
Half → 25K
7:16/mi
17:36 split
30K· 18.64 mi
2:19:19
Rank: #10348 (+475)
25K → 30K
7:38/mi
23:43 split
20M
2:29:45
Rank: #10125 (+223)
30K → 20M
7:41/mi
10:26 split
21M
2:38:07
Rank: #10087 (+38)
20M → 21M
8:22/mi
8:22 split
35K· 21.75 mi
2:43:36
Rank: #9930 (+157)
21M → 35K
7:20/mi
5:29 split
23M
2:53:54
Rank: #10026 (-96)
35K → 23M
8:14/mi
10:18 split
24M
3:01:33
Rank: #9922 (+104)
23M → 24M
7:39/mi
7:39 split
40K· 24.85 mi
3:08:36
Rank: #9986 (-64)
24M → 40K
8:15/mi
7:03 split
25.2M
3:11:46
Rank: #10024 (-38)
40K → 25.2M
9:11/mi
3:10 split
Finish· 26.22 mi
3:19:51
Rank: #10094 (-70)
25.2M → Finish
7:56/mi
8:05 split

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:38:00
Pace7:29 /mi
2nd Half
Distance13.11 mi
Time1:41:51
Pace7:46 /mi
📊Positive Split: 3.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:55:0023:457:3923:45
7:39
-
10K
6.21 mi11:18:4547:307:3923:45
7:39
0:00
15K
9.32 mi11:41:401:10:257:3322:55
7:23
-0:16
20K
12.43 mi12:04:251:33:107:3022:45
7:19
-0:04
Half
13.11 mi12:09:151:38:007:294:50
7:05
-0:14
25K
15.53 mi12:26:511:55:367:2617:36
7:16
+0:11
30K
18.64 mi12:50:342:19:197:2823:43
7:38
+0:22
20M
20.00 mi13:01:002:29:457:2910:26
7:41
+0:03
21M
21.00 mi13:09:222:38:077:328:22
8:22
+0:41
35K
21.75 mi13:14:512:43:367:315:29
7:20
-1:02
23M
23.00 mi13:25:092:53:547:3410:18
8:14
+0:54
24M
24.00 mi13:32:483:01:337:347:39
7:39
-0:35
40K
24.85 mi13:39:513:08:367:357:03
8:15
+0:36
25.2M
25.20 mi13:43:013:11:467:373:10
9:11
+0:56
Finish
26.22 mi13:51:063:19:517:388:05
7:56
-1:15

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

7:05 /mi

Average Pace

7:38 /mi

Slowest Pace

9:11 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:13:35

37% of race

Time at Steady Pace

1:29:18

45% of race

Time at Slower Pace

36:58

18% of race

Average Pace: 7:37 /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 mi10:55:0023:457:3923:45
7:39
#13477
10K
6.21 mi11:18:4547:307:3923:45
7:39
#13438
15K
9.32 mi11:41:401:10:257:3322:55
7:23
#12473
20K
12.43 mi12:04:251:33:107:3022:45
7:19
#11607
Half
13.11 mi12:09:151:38:007:294:50
7:05
#11437
25K
15.53 mi12:26:511:55:367:2617:36
7:16
#10823
30K
18.64 mi12:50:342:19:197:2823:43
7:38
#10348
20M
20.00 mi13:01:002:29:457:2910:26
7:41
#10125
21M
21.00 mi13:09:222:38:077:328:22
8:22
#10087
35K
21.75 mi13:14:512:43:367:315:29
7:20
#9930
23M
23.00 mi13:25:092:53:547:3410:18
8:14
#10026
24M
24.00 mi13:32:483:01:337:347:39
7:39
#9922
40K
24.85 mi13:39:513:08:367:357:03
8:15
#9986
25.2M
25.20 mi13:43:013:11:467:373:10
9:11
#10024
Finish
26.22 mi13:51:063:19:517:388:05
7:56
#10094
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi134773584358410659(Top 38%)2201(Top 18%)2201(Top 40%)
10K6.21 mi3.10 mi13438+393608-243608-2413417(Top 47%)3611(Top 30%)3611(Top 66%)
15K9.32 mi3.11 mi12473+9653085+5233085+52310659(Top 38%)2201(Top 18%)2201(Top 40%)
20K12.43 mi3.11 mi11607+8662669+4162669+4169242(Top 33%)1629(Top 13%)1629(Top 30%)
Half13.11 mi0.68 mi11437+1702577+922577+928267(Top 29%)1205(Top 10%)1205(Top 22%)
25K15.53 mi2.42 mi10823+6142298+2792298+2798083(Top 28%)1252(Top 10%)1252(Top 23%)
30K18.64 mi3.11 mi10348+4752124+1742124+1748721(Top 31%)1710(Top 14%)1710(Top 31%)
20M20.00 mi1.36 mi10125+2232047+772047+778234(Top 29%)1638(Top 13%)1638(Top 30%)
21M21.00 mi1.00 mi10087+382079-322079-329667(Top 34%)2454(Top 20%)2454(Top 45%)
35K21.75 mi0.75 mi9930+1572027+522027+527475(Top 26%)1497(Top 12%)1497(Top 27%)
23M23.00 mi1.25 mi10026-962120-932120-9311539(Top 41%)3494(Top 29%)3494(Top 64%)
24M24.00 mi1.00 mi9922+1042102+182102+188814(Top 31%)2240(Top 18%)2240(Top 41%)
40K24.85 mi0.85 mi9986-642168-662168-6611837(Top 42%)3824(Top 31%)3824(Top 70%)
25.2M25.20 mi0.35 mi10024-382202-342202-3412826(Top 45%)4384(Top 36%)4384(Top 80%)
Finish26.22 mi1.02 mi10094-702268-662268-6612428(Top 44%)4136(Top 34%)4136(Top 76%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 38%
×21story building
+97ft-345ft

Overall

10659

Females

2201

F18-39

2201

5K→10K

3.1 - 6.2 mi

Top 47%
×5story building
+79ft-138ft

Overall

13417

Females

3611

F18-39

3611

10K→15K

6.2 - 9.3 mi

Top 38%
×3story building
+67ft-78ft

Overall

10659

Females

2201

F18-39

2201

15K→20K

9.3 - 12.4 mi

Top 33%
×5story building
+106ft-86ft

Overall

9242

Females

1629

F18-39

1629

20K→Half

12.4 - 13.1 mi

Top 29%
×2story building
+19ft-37ft

Overall

8267

Females

1205

F18-39

1205

Half→25K

13.1 - 15.5 mi

Top 28%
×4story building
+66ft-88ft

Overall

8083

Females

1252

F18-39

1252

25K→30K

15.5 - 18.6 mi

Top 31%
×9story building
+181ft-148ft

Overall

8721

Females

1710

F18-39

1710

30K→20M

18.6 - 20.0 mi

Top 29%
×5story building
+64ft-50ft

Overall

8234

Females

1638

F18-39

1638

20M→21M

20.0 - 21.0 mi

Top 34%
×8story building
+106ft-24ft

Overall

9667

Females

2454

F18-39

2454

21M→35K

21.0 - 21.8 mi

Top 26%
×7story building
+17ft-86ft

Overall

7475

Females

1497

F18-39

1497

35K→23M

21.8 - 23.0 mi

Top 41%
×5story building
+23ft-63ft

Overall

11539

Females

3494

F18-39

3494

23M→24M

23.0 - 24.0 mi

Top 31%
×6story building
+12ft-82ft

Overall

8814

Females

2240

F18-39

2240

24M→40K

24.0 - 24.9 mi

Top 42%
×1story
+6ft-20ft

Overall

11837

Females

3824

F18-39

3824

40K→25.2M

24.9 - 25.2 mi

Top 45%
×1story
+13ft-16ft

Overall

12826

Females

4384

F18-39

4384

25.2M→Finish

25.2 - 26.2 mi

Top 44%
×2story building
+22ft-21ft

Overall

12428

Females

4136

F18-39

4136

Passing Analysis

Category:
Athletes Passed
4301*
Passed By
912
Net Change
+3383
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#13477
5K → 10K305266+39#13477#13438
10K → 15K9705+965#13438#12473
15K → 20K8682+866#12473#11607
20K → Half1722+170#11607#11437
Half → 25K6140+614#11437#10823
25K → 30K50429+475#10823#10348
30K → 20M23916+223#10348#10125
20M → 21M12788+38#10125#10087
21M → 35K1647+157#10087#9930
35K → 23M68162-96#9930#10026
23M → 24M133*29+104#10026#9922
24M → 40K57120-64#9922#9986
40K → 25.2M2764-38#9986#10024
25.2M → Finish53122-70#10024#10094
TOTALS4301*912+3383

* 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