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BOSTON MARATHON 2025

Jeff Blackshaw

Bib: 6051•M

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Overall
#0 / 28404
Top 32%
Gender (Male)
#0 / 16105
Top 45%
Division (M18-39)
#0 / 5642
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
20:30
Rank: #4595
Start → 5K
20:30 | 6:36/mi
10K· 6.21 mi
41:00
Rank: #4492 (+103)
5K → 10K
20:30 | 6:36/mi
15K· 9.32 mi
1:01:58
Rank: #4788 (-296)
10K → 15K
20:58 | 6:45/mi
20K· 12.43 mi
1:23:39
Rank: #5285 (-497)
15K → 20K
21:41 | 6:59/mi
Half· 13.11 mi
1:28:21
Rank: #5374 (-89)
20K → Half
4:42 | 6:53/mi
25K· 15.53 mi
1:45:46
Rank: #5790 (-416)
Half → 25K
17:25 | 7:11/mi
30K· 18.64 mi
2:09:36
Rank: #6342 (-552)
25K → 30K
23:50 | 7:40/mi
20M
2:20:37
Rank: #6572 (-230)
30K → 20M
11:01 | 8:06/mi
21M
2:29:57
Rank: #6996 (-424)
20M → 21M
9:20 | 9:20/mi
35K· 21.75 mi
2:36:21
Rank: #7249 (-253)
21M → 35K
6:24 | 8:33/mi
23M
2:48:04
Rank: #7856 (-607)
35K → 23M
11:43 | 9:21/mi
24M
2:56:37
Rank: #8178 (-322)
23M → 24M
8:33 | 8:33/mi
40K· 24.85 mi
3:04:21
Rank: #8511 (-333)
24M → 40K
7:44 | 9:03/mi
25.2M
3:07:53
Rank: #8712 (-201)
40K → 25.2M
3:32 | 10:15/mi
Finish· 26.22 mi
3:16:34
Rank: #9045 (-333)
25.2M → Finish
8:41 | 8:31/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:28:21
Pace6:44 /mi
2nd Half
Distance13.11 mi
Time1:48:13
Pace8:15 /mi
📊Positive Split: 22.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:24:5720:306:3620:30
6:36
-
10K
6.21 mi10:45:2741:006:3620:30
6:36
0:00
15K
9.32 mi11:06:251:01:586:3920:58
6:45
+0:09
20K
12.43 mi11:28:061:23:396:4421:41
6:59
+0:14
Half
13.11 mi11:32:481:28:216:444:42
6:53
-0:06
25K
15.53 mi11:50:131:45:466:4917:25
7:11
+0:18
30K
18.64 mi12:14:032:09:366:5723:50
7:40
+0:29
20M
20.00 mi12:25:042:20:377:0211:01
8:06
+0:26
21M
21.00 mi12:34:242:29:577:089:20
9:20
+1:14
35K
21.75 mi12:40:482:36:217:116:24
8:33
-0:47
23M
23.00 mi12:52:312:48:047:1811:43
9:21
+0:48
24M
24.00 mi13:01:042:56:377:228:33
8:33
-0:48
40K
24.85 mi13:08:483:04:217:257:44
9:03
+0:30
25.2M
25.20 mi13:12:203:07:537:273:32
10:15
+1:12
Finish
26.22 mi13:21:013:16:347:308:41
8:31
-1:44

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

6:36 /mi

Average Pace

7:30 /mi

Slowest Pace

10:15 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:45:46

54% of race

Time at Steady Pace

58:29

30% of race

Time at Slower Pace

32:19

16% of race

Average Pace: 7:30 /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 mi10:24:5720:306:3620:30
6:36
#4595
10K
6.21 mi10:45:2741:006:3620:30
6:36
#4492
15K
9.32 mi11:06:251:01:586:3920:58
6:45
#4788
20K
12.43 mi11:28:061:23:396:4421:41
6:59
#5285
Half
13.11 mi11:32:481:28:216:444:42
6:53
#5374
25K
15.53 mi11:50:131:45:466:4917:25
7:11
#5790
30K
18.64 mi12:14:032:09:366:5723:50
7:40
#6342
20M
20.00 mi12:25:042:20:377:0211:01
8:06
#6572
21M
21.00 mi12:34:242:29:577:089:20
9:20
#6996
35K
21.75 mi12:40:482:36:217:116:24
8:33
#7249
23M
23.00 mi12:52:312:48:047:1811:43
9:21
#7856
24M
24.00 mi13:01:042:56:377:228:33
8:33
#8178
40K
24.85 mi13:08:483:04:217:257:44
9:03
#8511
25.2M
25.20 mi13:12:203:07:537:273:32
10:15
#8712
Finish
26.22 mi13:21:013:16:347:308:41
8:31
#9045
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi4595431843185583(Top 20%)5115(Top 32%)5115(Top 91%)
10K6.21 mi3.10 mi4492+1034222+964222+964475(Top 16%)4194(Top 26%)4194(Top 74%)
15K9.32 mi3.11 mi4788-2964478-2564478-2565583(Top 20%)5115(Top 32%)5115(Top 91%)
20K12.43 mi3.11 mi5285-4974897-4194897-4196754(Top 24%)6019(Top 37%)6019(Top 107%)
Half13.11 mi0.68 mi5374-894971-744971-746841(Top 24%)6106(Top 38%)6106(Top 108%)
25K15.53 mi2.42 mi5790-4165295-3245295-3247486(Top 26%)6442(Top 40%)6442(Top 114%)
30K18.64 mi3.11 mi6342-5525705-4105705-4108983(Top 32%)7129(Top 44%)7129(Top 126%)
20M20.00 mi1.36 mi6572-2305862-1575862-15711121(Top 39%)8083(Top 50%)8083(Top 143%)
21M21.00 mi1.00 mi6996-4246151-2896151-28915286(Top 54%)9901(Top 61%)9901(Top 175%)
35K21.75 mi0.75 mi7249-2536302-1516302-15115745(Top 55%)10047(Top 62%)10047(Top 178%)
23M23.00 mi1.25 mi7856-6076649-3476649-34718023(Top 63%)10981(Top 68%)10981(Top 195%)
24M24.00 mi1.00 mi8178-3226814-1656814-16514786(Top 52%)9479(Top 59%)9479(Top 168%)
40K24.85 mi0.85 mi8511-3336984-1706984-17016523(Top 58%)10144(Top 63%)10144(Top 180%)
25.2M25.20 mi0.35 mi8712-2017082-987082-9817990(Top 63%)10790(Top 67%)10790(Top 191%)
Finish26.22 mi1.02 mi9045-3337233-1517233-15116314(Top 57%)10063(Top 62%)10063(Top 178%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 20%
×21stories
+97ft-345ft

Overall

5583

Males

5115

M18-39

5115

5K→10K

3.1 - 6.2 mi

Top 16%
×5stories
+79ft-138ft

Overall

4475

Males

4194

M18-39

4194

10K→15K

6.2 - 9.3 mi

Top 20%
×3stories
+67ft-78ft

Overall

5583

Males

5115

M18-39

5115

15K→20K

9.3 - 12.4 mi

Top 24%
×5stories
+106ft-86ft

Overall

6754

Males

6019

M18-39

6019

20K→Half

12.4 - 13.1 mi

Top 24%
×2stories
+19ft-37ft

Overall

6841

Males

6106

M18-39

6106

Half→25K

13.1 - 15.5 mi

Top 26%
×4stories
+66ft-88ft

Overall

7486

Males

6442

M18-39

6442

25K→30K

15.5 - 18.6 mi

Top 32%
×9stories
+181ft-148ft

Overall

8983

Males

7129

M18-39

7129

30K→20M

18.6 - 20.0 mi

Top 39%
×5stories
+64ft-50ft

Overall

11121

Males

8083

M18-39

8083

20M→21M

20.0 - 21.0 mi

Top 54%
×8stories
+106ft-24ft

Overall

15286

Males

9901

M18-39

9901

21M→35K

21.0 - 21.8 mi

Top 55%
×7stories
+17ft-86ft

Overall

15745

Males

10047

M18-39

10047

35K→23M

21.8 - 23.0 mi

Top 63%
×5stories
+23ft-63ft

Overall

18023

Males

10981

M18-39

10981

23M→24M

23.0 - 24.0 mi

Top 52%
×6stories
+12ft-82ft

Overall

14786

Males

9479

M18-39

9479

24M→40K

24.0 - 24.9 mi

Top 58%
×1story
+6ft-20ft

Overall

16523

Males

10144

M18-39

10144

40K→25.2M

24.9 - 25.2 mi

Top 63%
×1story
+13ft-16ft

Overall

17990

Males

10790

M18-39

10790

25.2M→Finish

25.2 - 26.2 mi

Top 57%
×2stories
+22ft-21ft

Overall

16314

Males

10063

M18-39

10063

Passing Analysis

Category:
Athletes Passed
558
Passed By
5008
Net Change
-4450
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#4595
5K → 10K226123+103#4595#4492
10K → 15K39335-296#4492#4788
15K → 20K39536-497#4788#5285
20K → Half796-89#5285#5374
Half → 25K41457-416#5374#5790
25K → 30K60612-552#5790#6342
30K → 20M46276-230#6342#6572
20M → 21M10434-424#6572#6996
21M → 35K11264-253#6996#7249
35K → 23M17624-607#7249#7856
23M → 24M21343-322#7856#8178
24M → 40K18351-333#8178#8511
40K → 25.2M8209-201#8511#8712
25.2M → Finish15348-333#8712#9045
TOTALS5585008-4450
📊

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