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BOSTON MARATHON 2025

Michael Lacasse

Bib: 4386•M

QC

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 9%
Gender (Male)
#0 / 16105
Top 15%
Division (M18-39)
#0 / 5642
Top 34%
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
6:20/mi
19:42
↑ 97↓ 3451.5%
10K· 6.21 mi
6:23/mi
39:32
↑ 79↓ 1380.4%
15K· 9.32 mi
6:22/mi
59:20
↑ 67↓ 78
20K· 12.43 mi
6:26/mi
1:19:18
↑ 106↓ 860.1%
Half· 13.11 mi
6:18/mi
1:23:36
↑ 19↓ 370.5%
25K· 15.53 mi
6:28/mi
1:39:17
↑ 66↓ 880.2%
30K· 18.64 mi
6:41/mi
2:00:03
↑ 181↓ 1480.2%
20M
6:43/mi
2:09:11
↑ 64↓ 500.2%
21M
7:03/mi
2:16:14
↑ 106↓ 241.6%
35K· 21.75 mi
6:29/mi
2:21:05
↑ 17↓ 861.7%
23M
6:51/mi
2:29:39
↑ 23↓ 630.6%
24M
6:32/mi
2:36:11
↓ 821.3%
40K· 24.85 mi
6:44/mi
2:41:56
↓ 200.3%
25.2M
7:29/mi
2:44:31
↑ 13↓ 160.2%
Finish· 26.22 mi
6:30/mi
2:51:08
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:23:36
Pace6:23 /mi
2nd Half
Distance13.11 mi
Time1:27:32
Pace6:41 /mi
📊Positive Split: 4.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:21:2919:426:2019:42
6:20
-
10K
6.21 mi10:41:1939:326:2219:50
6:23
+0:03
15K
9.32 mi11:01:0759:206:2219:48
6:22
-0:01
20K
12.43 mi11:21:051:19:186:2319:58
6:26
+0:04
Half
13.11 mi11:25:231:23:366:234:18
6:18
-0:08
25K
15.53 mi11:41:041:39:176:2315:41
6:28
+0:10
30K
18.64 mi12:01:502:00:036:2620:46
6:41
+0:13
20M
20.00 mi12:10:582:09:116:289:08
6:43
+0:02
21M
21.00 mi12:18:012:16:146:297:03
7:03
+0:20
35K
21.75 mi12:22:522:21:056:294:51
6:29
-0:34
23M
23.00 mi12:31:262:29:396:308:34
6:51
+0:22
24M
24.00 mi12:37:582:36:116:306:32
6:32
-0:19
40K
24.85 mi12:43:432:41:566:315:45
6:44
+0:12
25.2M
25.20 mi12:46:182:44:316:322:35
7:29
+0:45
Finish
26.22 mi12:52:552:51:086:326:37
6:30
-0:59

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

6:18 /mi

Average Pace

6:32 /mi

Slowest Pace

7:29 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:41:30

94% of race

Time at Steady Pace

7:03

4% of race

Time at Slower Pace

2:35

2% of race

Average Pace: 6:32 /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 mi10:21:2919:426:2019:42
6:20
#2700
10K
6.21 mi10:41:1939:326:2219:50
6:23
#2805
15K
9.32 mi11:01:0759:206:2219:48
6:22
#2772
20K
12.43 mi11:21:051:19:186:2319:58
6:26
#2742
Half
13.11 mi11:25:231:23:366:234:18
6:18
#2723
25K
15.53 mi11:41:041:39:176:2315:41
6:28
#2688
30K
18.64 mi12:01:502:00:036:2620:46
6:41
#2670
20M
20.00 mi12:10:582:09:116:289:08
6:43
#2625
21M
21.00 mi12:18:012:16:146:297:03
7:03
#2597
35K
21.75 mi12:22:522:21:056:294:51
6:29
#2573
23M
23.00 mi12:31:262:29:396:308:34
6:51
#2550
24M
24.00 mi12:37:582:36:116:306:32
6:32
#2500
40K
24.85 mi12:43:432:41:566:315:45
6:44
#2489
25.2M
25.20 mi12:46:182:44:316:322:35
7:29
#2490
Finish
26.22 mi12:52:552:51:086:326:37
6:30
#2470
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi2700257425742777(Top 10%)2644(Top 16%)2644(Top 47%)
10K6.21 mi3.10 mi2805-1052672-982672-982940(Top 10%)2799(Top 17%)2799(Top 50%)
15K9.32 mi3.11 mi2772+332642+302642+302777(Top 10%)2644(Top 16%)2644(Top 47%)
20K12.43 mi3.11 mi2742+302614+282614+282681(Top 9%)2551(Top 16%)2551(Top 45%)
Half13.11 mi0.68 mi2723+192598+162598+162565(Top 9%)2454(Top 15%)2454(Top 43%)
25K15.53 mi2.42 mi2688+352564+342564+342724(Top 10%)2592(Top 16%)2592(Top 46%)
30K18.64 mi3.11 mi2670+182549+152549+152815(Top 10%)2663(Top 17%)2663(Top 47%)
20M20.00 mi1.36 mi2625+452507+422507+422559(Top 9%)2407(Top 15%)2407(Top 43%)
21M21.00 mi1.00 mi2597+282476+312476+312465(Top 9%)2301(Top 14%)2301(Top 41%)
35K21.75 mi0.75 mi2573+242450+262450+262412(Top 8%)2255(Top 14%)2255(Top 40%)
23M23.00 mi1.25 mi2550+232427+232427+232917(Top 10%)2672(Top 17%)2672(Top 47%)
24M24.00 mi1.00 mi2500+502375+522375+522200(Top 8%)2040(Top 13%)2040(Top 36%)
40K24.85 mi0.85 mi2489+112361+142361+142504(Top 9%)2286(Top 14%)2286(Top 41%)
25.2M25.20 mi0.35 mi2490-1236123613372(Top 12%)2962(Top 18%)2962(Top 52%)
Finish26.22 mi1.02 mi2470+202341+202341+202795(Top 10%)2502(Top 16%)2502(Top 44%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 10%
×21story building
+97ft-345ft

Overall

2777

Males

2644

M18-39

2644

5K→10K

3.1 - 6.2 mi

Top 10%
×5story building
+79ft-138ft

Overall

2940

Males

2799

M18-39

2799

10K→15K

6.2 - 9.3 mi

Top 10%
×3story building
+67ft-78ft

Overall

2777

Males

2644

M18-39

2644

15K→20K

9.3 - 12.4 mi

Top 9%
×5story building
+106ft-86ft

Overall

2681

Males

2551

M18-39

2551

20K→Half

12.4 - 13.1 mi

Top 9%
×2story building
+19ft-37ft

Overall

2565

Males

2454

M18-39

2454

Half→25K

13.1 - 15.5 mi

Top 10%
×4story building
+66ft-88ft

Overall

2724

Males

2592

M18-39

2592

25K→30K

15.5 - 18.6 mi

Top 10%
×9story building
+181ft-148ft

Overall

2815

Males

2663

M18-39

2663

30K→20M

18.6 - 20.0 mi

Top 9%
×5story building
+64ft-50ft

Overall

2559

Males

2407

M18-39

2407

20M→21M

20.0 - 21.0 mi

Top 9%
×8story building
+106ft-24ft

Overall

2465

Males

2301

M18-39

2301

21M→35K

21.0 - 21.8 mi

Top 8%
×7story building
+17ft-86ft

Overall

2412

Males

2255

M18-39

2255

35K→23M

21.8 - 23.0 mi

Top 10%
×5story building
+23ft-63ft

Overall

2917

Males

2672

M18-39

2672

23M→24M

23.0 - 24.0 mi

Top 8%
×6story building
+12ft-82ft

Overall

2200

Males

2040

M18-39

2040

24M→40K

24.0 - 24.9 mi

Top 9%
×1story
+6ft-20ft

Overall

2504

Males

2286

M18-39

2286

40K→25.2M

24.9 - 25.2 mi

Top 12%
×1story
+13ft-16ft

Overall

3372

Males

2962

M18-39

2962

25.2M→Finish

25.2 - 26.2 mi

Top 10%
×2story building
+22ft-21ft

Overall

2795

Males

2502

M18-39

2502

Passing Analysis

Category:
Athletes Passed
876
Passed By
646
Net Change
+230
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#2700
5K → 10K81186-105#2700#2805
10K → 15K8855+33#2805#2772
15K → 20K9565+30#2772#2742
20K → Half278+19#2742#2723
Half → 25K8247+35#2723#2688
25K → 30K9779+18#2688#2670
30K → 20M7833+45#2670#2625
20M → 21M6234+28#2625#2597
21M → 35K4016+24#2597#2573
35K → 23M6239+23#2573#2550
23M → 24M7121+50#2550#2500
24M → 40K3726+11#2500#2489
40K → 25.2M1213-1#2489#2490
25.2M → Finish4424+20#2490#2470
TOTALS876646+230
📊

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