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BOSTON MARATHON 2025

Justin Dennis

Bib: 8531•M

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 13%
Gender (Male)
#0 / 16105
Top 21%
Masters (Masters Men)
#0 / 10463
Top 8%
Division (M40-44)
#0 / 2247
Top 23%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
21:36
Rank: #7443
Start → 5K
21:36 | 6:57/mi
10K· 6.21 mi
42:33
Rank: #6730 (+713)
5K → 10K
20:57 | 6:45/mi
15K· 9.32 mi
1:03:24
Rank: #6229 (+501)
10K → 15K
20:51 | 6:43/mi
20K· 12.43 mi
1:23:59
Rank: #5551 (+678)
15K → 20K
20:35 | 6:38/mi
Half· 13.11 mi
1:28:27
Rank: #5451 (+100)
20K → Half
4:28 | 6:33/mi
25K· 15.53 mi
1:44:30
Rank: #5044 (+407)
Half → 25K
16:03 | 6:37/mi
30K· 18.64 mi
2:05:17
Rank: #4496 (+548)
25K → 30K
20:47 | 6:41/mi
20M
2:14:27
Rank: #4282 (+214)
30K → 20M
9:10 | 6:45/mi
21M
2:21:21
Rank: #4082 (+200)
20M → 21M
6:54 | 6:54/mi
35K· 21.75 mi
2:26:18
Rank: #4019 (+63)
21M → 35K
4:57 | 6:37/mi
23M
2:34:52
Rank: #3901 (+118)
35K → 23M
8:34 | 6:51/mi
24M
2:41:32
Rank: #3822 (+79)
23M → 24M
6:40 | 6:40/mi
40K· 24.85 mi
2:47:16
Rank: #3731 (+91)
24M → 40K
5:44 | 6:42/mi
25.2M
2:49:45
Rank: #3672 (+59)
40K → 25.2M
2:29 | 7:12/mi
Finish· 26.22 mi
2:56:30
Rank: #3617 (+55)
25.2M → Finish
6:45 | 6:37/mi

The Course

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Half Splits

1st Half· via Half⚖️ Balanced
Distance13.11 mi
Time1:28:27
Pace6:45 /mi
2nd Half⚖️ Balanced
Distance13.11 mi
Time1:28:03
Pace6:43 /mi
📊Even Split: Consistent pacing between halves

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:47:2321:366:5721:36
6:57
-
10K
6.21 mi11:08:2042:336:5120:57
6:45
-0:12
15K
9.32 mi11:29:111:03:246:4820:51
6:43
-0:02
20K
12.43 mi11:49:461:23:596:4520:35
6:38
-0:05
Half
13.11 mi11:54:141:28:276:454:28
6:33
-0:05
25K
15.53 mi12:10:171:44:306:4416:03
6:37
+0:04
30K
18.64 mi12:31:042:05:176:4320:47
6:41
+0:04
20M
20.00 mi12:40:142:14:276:439:10
6:45
+0:04
21M
21.00 mi12:47:082:21:216:446:54
6:54
+0:09
35K
21.75 mi12:52:052:26:186:444:57
6:37
-0:17
23M
23.00 mi13:00:392:34:526:448:34
6:51
+0:14
24M
24.00 mi13:07:192:41:326:446:40
6:40
-0:11
40K
24.85 mi13:13:032:47:166:445:44
6:42
+0:02
25.2M
25.20 mi13:15:322:49:456:442:29
7:12
+0:30
Finish
26.22 mi13:22:172:56:306:446:45
6:37
-0:35

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

6:33 /mi

Average Pace

6:44 /mi

Slowest Pace

7:12 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:25:31

82% of race

Time at Steady Pace

30:59

18% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:44 /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 mi10:47:2321:366:5721:36
6:57
#7443
10K
6.21 mi11:08:2042:336:5120:57
6:45
#6730
15K
9.32 mi11:29:111:03:246:4820:51
6:43
#6229
20K
12.43 mi11:49:461:23:596:4520:35
6:38
#5551
Half
13.11 mi11:54:141:28:276:454:28
6:33
#5451
25K
15.53 mi12:10:171:44:306:4416:03
6:37
#5044
30K
18.64 mi12:31:042:05:176:4320:47
6:41
#4496
20M
20.00 mi12:40:142:14:276:439:10
6:45
#4282
21M
21.00 mi12:47:082:21:216:446:54
6:54
#4082
35K
21.75 mi12:52:052:26:186:444:57
6:37
#4019
23M
23.00 mi13:00:392:34:526:448:34
6:51
#3901
24M
24.00 mi13:07:192:41:326:446:40
6:40
#3822
40K
24.85 mi13:13:032:47:166:445:44
6:42
#3731
25.2M
25.20 mi13:15:322:49:456:442:29
7:12
#3672
Finish
26.22 mi13:22:172:56:306:446:45
6:37
#3617
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi7443662666265178(Top 18%)4791(Top 30%)4791(Top 213%)
10K6.21 mi3.10 mi6730+7136084+5426084+5425763(Top 20%)5279(Top 33%)5279(Top 235%)
15K9.32 mi3.11 mi6229+5015696+3885696+3885178(Top 18%)4791(Top 30%)4791(Top 213%)
20K12.43 mi3.11 mi5551+6785113+5835113+5833873(Top 14%)3651(Top 23%)3651(Top 162%)
Half13.11 mi0.68 mi5451+1005031+825031+824036(Top 14%)3800(Top 24%)3800(Top 169%)
25K15.53 mi2.42 mi5044+4074676+3554676+3553601(Top 13%)3393(Top 21%)3393(Top 151%)
30K18.64 mi3.11 mi4496+5484195+4814195+4812849(Top 10%)2694(Top 17%)2694(Top 120%)
20M20.00 mi1.36 mi4282+2144002+1934002+1932684(Top 9%)2518(Top 16%)2518(Top 112%)
21M21.00 mi1.00 mi4082+2003820+1823820+1821906(Top 7%)1797(Top 11%)1797(Top 80%)
35K21.75 mi0.75 mi4019+633756+643756+643080(Top 11%)2835(Top 18%)2835(Top 126%)
23M23.00 mi1.25 mi3901+1183642+1143642+1142930(Top 10%)2685(Top 17%)2685(Top 119%)
24M24.00 mi1.00 mi3822+793567+753567+752820(Top 10%)2587(Top 16%)2587(Top 115%)
40K24.85 mi0.85 mi3731+913481+863481+862417(Top 9%)2214(Top 14%)2214(Top 99%)
25.2M25.20 mi0.35 mi3672+593426+553426+552197(Top 8%)1986(Top 12%)1986(Top 88%)
Finish26.22 mi1.02 mi3617+553370+563370+563483(Top 12%)3052(Top 19%)3052(Top 136%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 18%
×21stories
+97ft-345ft

Overall

5178

Males

4791

M40-44

4791

5K→10K

3.1 - 6.2 mi

Top 20%
×5stories
+79ft-138ft

Overall

5763

Males

5279

M40-44

5279

10K→15K

6.2 - 9.3 mi

Top 18%
×3stories
+67ft-78ft

Overall

5178

Males

4791

M40-44

4791

15K→20K

9.3 - 12.4 mi

Top 14%
×5stories
+106ft-86ft

Overall

3873

Males

3651

M40-44

3651

20K→Half

12.4 - 13.1 mi

Top 14%
×2stories
+19ft-37ft

Overall

4036

Males

3800

M40-44

3800

Half→25K

13.1 - 15.5 mi

Top 13%
×4stories
+66ft-88ft

Overall

3601

Males

3393

M40-44

3393

25K→30K

15.5 - 18.6 mi

Top 10%
×9stories
+181ft-148ft

Overall

2849

Males

2694

M40-44

2694

30K→20M

18.6 - 20.0 mi

Top 9%
×5stories
+64ft-50ft

Overall

2684

Males

2518

M40-44

2518

20M→21M

20.0 - 21.0 mi

Top 7%
×8stories
+106ft-24ft

Overall

1906

Males

1797

M40-44

1797

21M→35K

21.0 - 21.8 mi

Top 11%
×7stories
+17ft-86ft

Overall

3080

Males

2835

M40-44

2835

35K→23M

21.8 - 23.0 mi

Top 10%
×5stories
+23ft-63ft

Overall

2930

Males

2685

M40-44

2685

23M→24M

23.0 - 24.0 mi

Top 10%
×6stories
+12ft-82ft

Overall

2820

Males

2587

M40-44

2587

24M→40K

24.0 - 24.9 mi

Top 9%
×1story
+6ft-20ft

Overall

2417

Males

2214

M40-44

2214

40K→25.2M

24.9 - 25.2 mi

Top 8%
×1story
+13ft-16ft

Overall

2197

Males

1986

M40-44

1986

25.2M→Finish

25.2 - 26.2 mi

Top 12%
×2stories
+22ft-21ft

Overall

3483

Males

3052

M40-44

3052

Passing Analysis

Category:
Athletes Passed
3931
Passed By
105
Net Change
+3826
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#7443
5K → 10K72815+713#7443#6730
10K → 15K51312+501#6730#6229
15K → 20K6780+678#6229#5551
20K → Half1022+100#5551#5451
Half → 25K4081+407#5451#5044
25K → 30K5513+548#5044#4496
30K → 20M2173+214#4496#4282
20M → 21M2022+200#4282#4082
21M → 35K7310+63#4082#4019
35K → 23M13315+118#4019#3901
23M → 24M8910+79#3901#3822
24M → 40K976+91#3822#3731
40K → 25.2M634+59#3731#3672
25.2M → Finish7722+55#3672#3617
TOTALS3931105+3826
📊

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