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BOSTON MARATHON 2025

Justin Harrison

Bib: 9958•M

TX

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 25%
Gender (Male)
#0 / 16105
Top 37%
Masters (Masters Men)
#0 / 10463
Top 24%
Division (M45-49)
#0 / 2386
Top 33%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
20:14
Rank: #3923
Start → 5K
20:14 | 6:31/mi
10K· 6.21 mi
40:48
Rank: #4240 (-317)
5K → 10K
20:34 | 6:37/mi
15K· 9.32 mi
1:01:34
Rank: #4438 (-198)
10K → 15K
20:46 | 6:41/mi
20K· 12.43 mi
1:22:42
Rank: #4586 (-148)
15K → 20K
21:08 | 6:48/mi
Half· 13.11 mi
1:27:18
Rank: #4637 (-51)
20K → Half
4:36 | 6:45/mi
25K· 15.53 mi
1:43:55
Rank: #4710 (-73)
Half → 25K
16:37 | 6:51/mi
30K· 18.64 mi
2:08:17
Rank: #5830 (-1120)
25K → 30K
24:22 | 7:51/mi
20M
2:19:39
Rank: #6271 (-441)
30K → 20M
11:22 | 8:22/mi
21M
2:28:22
Rank: #6471 (-200)
20M → 21M
8:43 | 8:43/mi
35K· 21.75 mi
2:34:15
Rank: #6575 (-104)
21M → 35K
5:53 | 7:52/mi
23M
2:44:25
Rank: #6736 (-161)
35K → 23M
10:10 | 8:07/mi
24M
2:51:56
Rank: #6725 (+11)
23M → 24M
7:31 | 7:31/mi
40K· 24.85 mi
2:58:27
Rank: #6714 (+11)
24M → 40K
6:31 | 7:37/mi
25.2M
3:01:28
Rank: #6756 (-42)
40K → 25.2M
3:01 | 8:45/mi
Finish· 26.22 mi
3:09:44
Rank: #6978 (-222)
25.2M → Finish
8:16 | 8:07/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:27:18
Pace6:40 /mi
2nd Half
Distance13.11 mi
Time1:42:26
Pace7:49 /mi
📊Positive Split: 17.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:46:2120:146:3120:14
6:31
-
10K
6.21 mi11:06:5540:486:3420:34
6:37
+0:06
15K
9.32 mi11:27:411:01:346:3620:46
6:41
+0:04
20K
12.43 mi11:48:491:22:426:3921:08
6:48
+0:07
Half
13.11 mi11:53:251:27:186:404:36
6:45
-0:03
25K
15.53 mi12:10:021:43:556:4116:37
6:51
+0:06
30K
18.64 mi12:34:242:08:176:5324:22
7:51
+1:00
20M
20.00 mi12:45:462:19:396:5911:22
8:22
+0:31
21M
21.00 mi12:54:292:28:227:048:43
8:43
+0:21
35K
21.75 mi13:00:222:34:157:065:53
7:52
-0:51
23M
23.00 mi13:10:322:44:257:0910:10
8:07
+0:15
24M
24.00 mi13:18:032:51:567:107:31
7:31
-0:36
40K
24.85 mi13:24:342:58:277:116:31
7:37
+0:06
25.2M
25.20 mi13:27:353:01:287:123:01
8:45
+1:08
Finish
26.22 mi13:35:513:09:447:158:16
8:07
-0:38

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

6:31 /mi

Average Pace

7:15 /mi

Slowest Pace

8:45 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:43:55

55% of race

Time at Steady Pace

44:17

23% of race

Time at Slower Pace

41:32

22% of race

Average Pace: 7:14 /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 mi10:46:2120:146:3120:14
6:31
#3923
10K
6.21 mi11:06:5540:486:3420:34
6:37
#4240
15K
9.32 mi11:27:411:01:346:3620:46
6:41
#4438
20K
12.43 mi11:48:491:22:426:3921:08
6:48
#4586
Half
13.11 mi11:53:251:27:186:404:36
6:45
#4637
25K
15.53 mi12:10:021:43:556:4116:37
6:51
#4710
30K
18.64 mi12:34:242:08:176:5324:22
7:51
#5830
20M
20.00 mi12:45:462:19:396:5911:22
8:22
#6271
21M
21.00 mi12:54:292:28:227:048:43
8:43
#6471
35K
21.75 mi13:00:222:34:157:065:53
7:52
#6575
23M
23.00 mi13:10:322:44:257:0910:10
8:07
#6736
24M
24.00 mi13:18:032:51:567:107:31
7:31
#6725
40K
24.85 mi13:24:342:58:277:116:31
7:37
#6714
25.2M
25.20 mi13:27:353:01:287:123:01
8:45
#6756
Finish
26.22 mi13:35:513:09:447:158:16
8:07
#6978
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi3923371337134937(Top 17%)4600(Top 29%)4600(Top 193%)
10K6.21 mi3.10 mi4240-3173988-2753988-2754625(Top 16%)4331(Top 27%)4331(Top 182%)
15K9.32 mi3.11 mi4438-1984173-1854173-1854937(Top 17%)4600(Top 29%)4600(Top 193%)
20K12.43 mi3.11 mi4586-1484290-1174290-1175313(Top 19%)4879(Top 30%)4879(Top 204%)
Half13.11 mi0.68 mi4637-514334-444334-445613(Top 20%)5133(Top 32%)5133(Top 215%)
25K15.53 mi2.42 mi4710-734389-554389-555300(Top 19%)4847(Top 30%)4847(Top 203%)
30K18.64 mi3.11 mi5830-11205305-9165305-91610220(Top 36%)7798(Top 48%)7798(Top 327%)
20M20.00 mi1.36 mi6271-4415637-3325637-33212896(Top 45%)8939(Top 56%)8939(Top 375%)
21M21.00 mi1.00 mi6471-2005771-1345771-13411732(Top 41%)8224(Top 51%)8224(Top 345%)
35K21.75 mi0.75 mi6575-1045825-545825-5411220(Top 40%)7947(Top 49%)7947(Top 333%)
23M23.00 mi1.25 mi6736-1615912-875912-8710840(Top 38%)7658(Top 48%)7658(Top 321%)
24M24.00 mi1.00 mi6725+115881+315881+317775(Top 27%)5969(Top 37%)5969(Top 250%)
40K24.85 mi0.85 mi6714+115847+345847+347511(Top 26%)5716(Top 35%)5716(Top 240%)
25.2M25.20 mi0.35 mi6756-425857-105857-1010182(Top 36%)7006(Top 44%)7006(Top 294%)
Finish26.22 mi1.02 mi6978-2225979-1225979-12213623(Top 48%)8812(Top 55%)8812(Top 369%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 17%
×21stories
+97ft-345ft

Overall

4937

Males

4600

M45-49

4600

5K→10K

3.1 - 6.2 mi

Top 16%
×5stories
+79ft-138ft

Overall

4625

Males

4331

M45-49

4331

10K→15K

6.2 - 9.3 mi

Top 17%
×3stories
+67ft-78ft

Overall

4937

Males

4600

M45-49

4600

15K→20K

9.3 - 12.4 mi

Top 19%
×5stories
+106ft-86ft

Overall

5313

Males

4879

M45-49

4879

20K→Half

12.4 - 13.1 mi

Top 20%
×2stories
+19ft-37ft

Overall

5613

Males

5133

M45-49

5133

Half→25K

13.1 - 15.5 mi

Top 19%
×4stories
+66ft-88ft

Overall

5300

Males

4847

M45-49

4847

25K→30K

15.5 - 18.6 mi

Top 36%
×9stories
+181ft-148ft

Overall

10220

Males

7798

M45-49

7798

30K→20M

18.6 - 20.0 mi

Top 45%
×5stories
+64ft-50ft

Overall

12896

Males

8939

M45-49

8939

20M→21M

20.0 - 21.0 mi

Top 41%
×8stories
+106ft-24ft

Overall

11732

Males

8224

M45-49

8224

21M→35K

21.0 - 21.8 mi

Top 40%
×7stories
+17ft-86ft

Overall

11220

Males

7947

M45-49

7947

35K→23M

21.8 - 23.0 mi

Top 38%
×5stories
+23ft-63ft

Overall

10840

Males

7658

M45-49

7658

23M→24M

23.0 - 24.0 mi

Top 27%
×6stories
+12ft-82ft

Overall

7775

Males

5969

M45-49

5969

24M→40K

24.0 - 24.9 mi

Top 26%
×1story
+6ft-20ft

Overall

7511

Males

5716

M45-49

5716

40K→25.2M

24.9 - 25.2 mi

Top 36%
×1story
+13ft-16ft

Overall

10182

Males

7006

M45-49

7006

25.2M→Finish

25.2 - 26.2 mi

Top 48%
×2stories
+22ft-21ft

Overall

13623

Males

8812

M45-49

8812

Passing Analysis

Category:
Athletes Passed
576
Passed By
3631
Net Change
-3055
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#3923
5K → 10K51368-317#3923#4240
10K → 15K41239-198#4240#4438
15K → 20K72220-148#4438#4586
20K → Half657-51#4586#4637
Half → 25K84157-73#4637#4710
25K → 30K371157-1120#4710#5830
30K → 20M11452-441#5830#6271
20M → 21M21221-200#6271#6471
21M → 35K28132-104#6471#6575
35K → 23M46207-161#6575#6736
23M → 24M7261+11#6736#6725
24M → 40K6857+11#6725#6714
40K → 25.2M2567-42#6714#6756
25.2M → Finish14236-222#6756#6978
TOTALS5763631-3055
📊

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