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BOSTON MARATHON 2025

Jason Lacroix

Bib: 32336•M

NH

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Male)
#0 / 16105
Masters (Masters Men)
#0 / 10463
Division (M50-54)
#0 / 1996
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent
Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
5K· 3.11 mi
9:19/mi
28:58
↑ 97↓ 3451.5%
10K· 6.21 mi
9:22/mi
58:03
↑ 79↓ 1380.4%
15K· 9.32 mi
8:59/mi
1:25:57
↑ 67↓ 78
20K· 12.43 mi
9:09/mi
1:54:22
↑ 106↓ 860.1%
Half· 13.11 mi
8:59/mi
2:00:30
↑ 19↓ 370.5%
25K· 15.53 mi
9:35/mi
2:23:43
↑ 66↓ 880.2%
30K· 18.64 mi
10:16/mi
2:55:36
↑ 181↓ 1480.2%
20M
10:21/mi
3:09:40
↑ 64↓ 500.2%
21M
11:46/mi
3:21:26
↑ 106↓ 241.6%
35K· 21.75 mi
10:20/mi
3:29:10
↑ 17↓ 861.7%
23M
10:32/mi
3:42:21
↑ 23↓ 630.6%
24M
10:23/mi
3:52:44
↓ 821.3%
40K· 24.85 mi
10:29/mi
4:01:42
↓ 200.3%
25.2M
11:36/mi
4:05:42
↑ 13↓ 160.2%
Finish· 26.22 mi
9:33/mi
4:15:26
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:00:30
Pace9:12 /mi
2nd Half
Distance13.11 mi
Time2:14:56
Pace10:18 /mi
📊Positive Split: 12.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:53:3728:589:1928:58
9:19
-
10K
6.21 mi12:22:4258:039:2129:05
9:22
+0:03
15K
9.32 mi12:50:361:25:579:1327:54
8:59
-0:23
20K
12.43 mi13:19:011:54:229:1228:25
9:09
+0:10
Half
13.11 mi13:25:092:00:309:126:08
8:59
-0:10
25K
15.53 mi13:48:222:23:439:1523:13
9:35
+0:36
30K
18.64 mi14:20:152:55:369:2531:53
10:16
+0:41
20M
20.00 mi14:34:193:09:409:2914:04
10:21
+0:05
21M
21.00 mi14:46:053:21:269:3611:46
11:46
+1:25
35K
21.75 mi14:53:493:29:109:377:44
10:20
-1:26
23M
23.00 mi15:07:003:42:219:4013:11
10:32
+0:12
24M
24.00 mi15:17:233:52:449:4210:23
10:23
-0:09
40K
24.85 mi15:26:214:01:429:438:58
10:29
+0:06
25.2M
25.20 mi15:30:214:05:429:454:00
11:36
+1:07
Finish
26.22 mi15:40:054:15:269:459:44
9:33
-2:03

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

8:59 /mi

Average Pace

9:45 /mi

Slowest Pace

11:46 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:33:27

60% of race

Time at Steady Pace

1:26:13

34% of race

Time at Slower Pace

15:46

6% of race

Average Pace: 9:45 /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 mi11:53:3728:589:1928:58
9:19
#23626
10K
6.21 mi12:22:4258:039:2129:05
9:22
#23699
15K
9.32 mi12:50:361:25:579:1327:54
8:59
#23185
20K
12.43 mi13:19:011:54:229:1228:25
9:09
#22796
Half
13.11 mi13:25:092:00:309:126:08
8:59
#22743
25K
15.53 mi13:48:222:23:439:1523:13
9:35
#22617
30K
18.64 mi14:20:152:55:369:2531:53
10:16
#22555
20M
20.00 mi14:34:193:09:409:2914:04
10:21
#22499
21M
21.00 mi14:46:053:21:269:3611:46
11:46
#22538
35K
21.75 mi14:53:493:29:109:377:44
10:20
#22534
23M
23.00 mi15:07:003:42:219:4013:11
10:32
#22501
24M
24.00 mi15:17:233:52:449:4210:23
10:23
#22475
40K
24.85 mi15:26:214:01:429:438:58
10:29
#22444
25.2M
25.20 mi15:30:214:05:429:454:00
11:36
#22447
Finish
26.22 mi15:40:054:15:269:459:44
9:33
#22410
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi3.11 mi23626140631406321948(Top 77%)13369(Top 83%)13369(Top 670%)
10K6.21 mi3.10 mi23699-7314108-4514108-4523716(Top 83%)14125(Top 88%)14125(Top 708%)
15K9.32 mi3.11 mi23185+51413891+21713891+21721948(Top 77%)13369(Top 83%)13369(Top 670%)
20K12.43 mi3.11 mi22796+38913730+16113730+16121657(Top 76%)13197(Top 82%)13197(Top 661%)
Half13.11 mi0.68 mi22743+5313704+2613704+2621771(Top 77%)13259(Top 82%)13259(Top 664%)
25K15.53 mi2.42 mi22617+12613622+8213622+8222108(Top 78%)13337(Top 83%)13337(Top 668%)
30K18.64 mi3.11 mi22555+6213554+6813554+6822344(Top 79%)13318(Top 83%)13318(Top 667%)
20M20.00 mi1.36 mi22499+5613506+4813506+4822010(Top 77%)13061(Top 81%)13061(Top 654%)
21M21.00 mi1.00 mi22538-3913511-513511-523150(Top 82%)13519(Top 84%)13519(Top 677%)
35K21.75 mi0.75 mi22534+413493+1813493+1822784(Top 80%)13295(Top 83%)13295(Top 666%)
23M23.00 mi1.25 mi22501+3313455+3813455+3822090(Top 78%)12924(Top 80%)12924(Top 647%)
24M24.00 mi1.00 mi22475+2613419+3613419+3622478(Top 79%)13041(Top 81%)13041(Top 653%)
40K24.85 mi0.85 mi22444+3113384+3513384+3521883(Top 77%)12690(Top 79%)12690(Top 636%)
25.2M25.20 mi0.35 mi22447-313375+913375+922288(Top 78%)12938(Top 80%)12938(Top 648%)
Finish26.22 mi1.02 mi22410+3713345+3013345+3021362(Top 75%)12468(Top 77%)12468(Top 625%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 77%
×21story building
+97ft-345ft

Overall

21948

Males

13369

M50-54

13369

5K→10K

3.1 - 6.2 mi

Top 83%
×5story building
+79ft-138ft

Overall

23716

Males

14125

M50-54

14125

10K→15K

6.2 - 9.3 mi

Top 77%
×3story building
+67ft-78ft

Overall

21948

Males

13369

M50-54

13369

15K→20K

9.3 - 12.4 mi

Top 76%
×5story building
+106ft-86ft

Overall

21657

Males

13197

M50-54

13197

20K→Half

12.4 - 13.1 mi

Top 77%
×2story building
+19ft-37ft

Overall

21771

Males

13259

M50-54

13259

Half→25K

13.1 - 15.5 mi

Top 78%
×4story building
+66ft-88ft

Overall

22108

Males

13337

M50-54

13337

25K→30K

15.5 - 18.6 mi

Top 79%
×9story building
+181ft-148ft

Overall

22344

Males

13318

M50-54

13318

30K→20M

18.6 - 20.0 mi

Top 77%
×5story building
+64ft-50ft

Overall

22010

Males

13061

M50-54

13061

20M→21M

20.0 - 21.0 mi

Top 82%
×8story building
+106ft-24ft

Overall

23150

Males

13519

M50-54

13519

21M→35K

21.0 - 21.8 mi

Top 80%
×7story building
+17ft-86ft

Overall

22784

Males

13295

M50-54

13295

35K→23M

21.8 - 23.0 mi

Top 78%
×5story building
+23ft-63ft

Overall

22090

Males

12924

M50-54

12924

23M→24M

23.0 - 24.0 mi

Top 79%
×6story building
+12ft-82ft

Overall

22478

Males

13041

M50-54

13041

24M→40K

24.0 - 24.9 mi

Top 77%
×1story
+6ft-20ft

Overall

21883

Males

12690

M50-54

12690

40K→25.2M

24.9 - 25.2 mi

Top 78%
×1story
+13ft-16ft

Overall

22288

Males

12938

M50-54

12938

25.2M→Finish

25.2 - 26.2 mi

Top 75%
×2story building
+22ft-21ft

Overall

21362

Males

12468

M50-54

12468

Passing Analysis

Category:
Athletes Passed
2122
Passed By
906
Net Change
+1216
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#23626
5K → 10K208281-73#23626#23699
10K → 15K53218+514#23699#23185
15K → 20K41122+389#23185#22796
20K → Half629+53#22796#22743
Half → 25K20680+126#22743#22617
25K → 30K205143+62#22617#22555
30K → 20M10347+56#22555#22499
20M → 21M61100-39#22499#22538
21M → 35K5147+4#22538#22534
35K → 23M8653+33#22534#22501
23M → 24M5832+26#22501#22475
24M → 40K6231+31#22475#22444
40K → 25.2M1720-3#22444#22447
25.2M → Finish6023+37#22447#22410
TOTALS2122906+1216
📊

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