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BOSTON MARATHON 2025

Michael Lacy

Bib: 26521•M

MA

0:00
0:00
/ mi
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Overall
#0 / 28404
Gender (Male)
#0 / 16105
Division (M18-39)
#0 / 5642
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
8:51/mi
27:31
↑ 97↓ 3451.5%
10K· 6.21 mi
8:57/mi
55:19
↑ 79↓ 1380.4%
15K· 9.32 mi
9:53/mi
1:26:00
↑ 67↓ 78
20K· 12.43 mi
11:04/mi
2:00:22
↑ 106↓ 860.1%
Half· 13.11 mi
10:32/mi
2:07:33
↑ 19↓ 370.5%
25K· 15.53 mi
12:18/mi
2:37:22
↑ 66↓ 880.2%
30K· 18.64 mi
12:16/mi
3:15:28
↑ 181↓ 1480.2%
20M
12:53/mi
3:32:59
↑ 64↓ 500.2%
21M
15:03/mi
3:48:02
↑ 106↓ 241.6%
35K· 21.75 mi
11:06/mi
3:56:20
↑ 17↓ 861.7%
23M
11:51/mi
4:11:10
↑ 23↓ 630.6%
24M
17:35/mi
4:28:45
↓ 821.3%
40K· 24.85 mi
12:47/mi
4:39:41
↓ 200.3%
25.2M
12:46/mi
4:44:05
↑ 13↓ 160.2%
Finish· 26.22 mi
10:49/mi
4:55:06
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:07:33
Pace9:44 /mi
2nd Half
Distance13.11 mi
Time2:47:33
Pace12:47 /mi
📊Positive Split: 31.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:43:0827:318:5127:31
8:51
-
10K
6.21 mi12:10:5655:198:5427:48
8:57
+0:06
15K
9.32 mi12:41:371:26:009:1430:41
9:53
+0:56
20K
12.43 mi13:15:592:00:229:4134:22
11:04
+1:11
Half
13.11 mi13:23:102:07:339:447:11
10:32
-0:32
25K
15.53 mi13:52:592:37:2210:0829:49
12:18
+1:46
30K
18.64 mi14:31:053:15:2810:2938:06
12:16
-0:02
20M
20.00 mi14:48:363:32:5910:3917:31
12:53
+0:37
21M
21.00 mi15:03:393:48:0210:5215:03
15:03
+2:10
35K
21.75 mi15:11:573:56:2010:528:18
11:06
-3:57
23M
23.00 mi15:26:474:11:1010:5514:50
11:51
+0:45
24M
24.00 mi15:44:224:28:4511:1217:35
17:35
+5:44
40K
24.85 mi15:55:184:39:4111:1510:56
12:47
-4:48
25.2M
25.20 mi15:59:424:44:0511:164:24
12:46
-0:01
Finish
26.22 mi16:10:434:55:0611:1611:01
10:49
-1:57

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

8:51 /mi

Average Pace

11:16 /mi

Slowest Pace

17:35 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:33:11

32% of race

Time at Steady Pace

2:49:17

57% of race

Time at Slower Pace

32:38

11% of race

Average Pace: 11:15 /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 mi11:43:0827:318:5127:31
8:51
#21794
10K
6.21 mi12:10:5655:198:5427:48
8:57
#21967
15K
9.32 mi12:41:371:26:009:1430:41
9:53
#23203
20K
12.43 mi13:15:592:00:229:4134:22
11:04
#24269
Half
13.11 mi13:23:102:07:339:447:11
10:32
#24348
25K
15.53 mi13:52:592:37:2210:0829:49
12:18
#24982
30K
18.64 mi14:31:053:15:2810:2938:06
12:16
#25215
20M
20.00 mi14:48:363:32:5910:3917:31
12:53
#25335
21M
21.00 mi15:03:393:48:0210:5215:03
15:03
#25489
35K
21.75 mi15:11:573:56:2010:528:18
11:06
#25455
23M
23.00 mi15:26:474:11:1010:5514:50
11:51
#25421
24M
24.00 mi15:44:224:28:4511:1217:35
17:35
#25852
40K
24.85 mi15:55:184:39:4111:1510:56
12:47
#25885
25.2M
25.20 mi15:59:424:44:0511:164:24
12:46
#25874
Finish
26.22 mi16:10:434:55:0611:1611:01
10:49
#25853
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi21794132251322524716(Top 87%)14589(Top 91%)14589(Top 259%)
10K6.21 mi3.10 mi21967-17313316-9113316-9122144(Top 78%)13406(Top 83%)13406(Top 238%)
15K9.32 mi3.11 mi23203-123613900-58413900-58424716(Top 87%)14589(Top 91%)14589(Top 259%)
20K12.43 mi3.11 mi24269-106614364-46414364-46426098(Top 92%)15168(Top 94%)15168(Top 269%)
Half13.11 mi0.68 mi24348-7914391-2714391-2725837(Top 91%)15036(Top 93%)15036(Top 267%)
25K15.53 mi2.42 mi24982-63414681-29014681-29026748(Top 94%)15399(Top 96%)15399(Top 273%)
30K18.64 mi3.11 mi25215-23314750-6914750-6925901(Top 91%)14947(Top 93%)14947(Top 265%)
20M20.00 mi1.36 mi25335-12014783-3314783-3326341(Top 93%)15085(Top 94%)15085(Top 267%)
21M21.00 mi1.00 mi25489-15414847-6414847-6427195(Top 96%)15456(Top 96%)15456(Top 274%)
35K21.75 mi0.75 mi25455+3414822+2514822+2524422(Top 86%)14074(Top 87%)14074(Top 249%)
23M23.00 mi1.25 mi25421+3414791+3114791+3124860(Top 88%)14274(Top 89%)14274(Top 253%)
24M24.00 mi1.00 mi25852-43114988-19714988-19728344(Top 100%)16063(Top 100%)16063(Top 285%)
40K24.85 mi0.85 mi25885-3315001-1315001-1326056(Top 92%)14821(Top 92%)14821(Top 263%)
25.2M25.20 mi0.35 mi25874+1114988+1314988+1324679(Top 87%)14114(Top 88%)14114(Top 250%)
Finish26.22 mi1.02 mi25853+2114966+2214966+2224979(Top 88%)14269(Top 89%)14269(Top 253%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 87%
×21story building
+97ft-345ft

Overall

24716

Males

14589

M18-39

14589

5K→10K

3.1 - 6.2 mi

Top 78%
×5story building
+79ft-138ft

Overall

22144

Males

13406

M18-39

13406

10K→15K

6.2 - 9.3 mi

Top 87%
×3story building
+67ft-78ft

Overall

24716

Males

14589

M18-39

14589

15K→20K

9.3 - 12.4 mi

Top 92%
×5story building
+106ft-86ft

Overall

26098

Males

15168

M18-39

15168

20K→Half

12.4 - 13.1 mi

Top 91%
×2story building
+19ft-37ft

Overall

25837

Males

15036

M18-39

15036

Half→25K

13.1 - 15.5 mi

Top 94%
×4story building
+66ft-88ft

Overall

26748

Males

15399

M18-39

15399

25K→30K

15.5 - 18.6 mi

Top 91%
×9story building
+181ft-148ft

Overall

25901

Males

14947

M18-39

14947

30K→20M

18.6 - 20.0 mi

Top 93%
×5story building
+64ft-50ft

Overall

26341

Males

15085

M18-39

15085

20M→21M

20.0 - 21.0 mi

Top 96%
×8story building
+106ft-24ft

Overall

27195

Males

15456

M18-39

15456

21M→35K

21.0 - 21.8 mi

Top 86%
×7story building
+17ft-86ft

Overall

24422

Males

14074

M18-39

14074

35K→23M

21.8 - 23.0 mi

Top 88%
×5story building
+23ft-63ft

Overall

24860

Males

14274

M18-39

14274

23M→24M

23.0 - 24.0 mi

Top 100%
×6story building
+12ft-82ft

Overall

28344

Males

16063

M18-39

16063

24M→40K

24.0 - 24.9 mi

Top 92%
×1story
+6ft-20ft

Overall

26056

Males

14821

M18-39

14821

40K→25.2M

24.9 - 25.2 mi

Top 87%
×1story
+13ft-16ft

Overall

24679

Males

14114

M18-39

14114

25.2M→Finish

25.2 - 26.2 mi

Top 88%
×2story building
+22ft-21ft

Overall

24979

Males

14269

M18-39

14269

Passing Analysis

Category:
Athletes Passed
498
Passed By
4557
Net Change
-4059
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#21794
5K → 10K188361-173#21794#21967
10K → 15K221258-1236#21967#23203
15K → 20K111077-1066#23203#24269
20K → Half887-79#24269#24348
Half → 25K10644-634#24348#24982
25K → 30K67300-233#24982#25215
30K → 20M19139-120#25215#25335
20M → 21M9163-154#25335#25489
21M → 35K406+34#25489#25455
35K → 23M5925+34#25455#25421
23M → 24M3434-431#25421#25852
24M → 40K1245-33#25852#25885
40K → 25.2M176+11#25885#25874
25.2M → Finish3312+21#25874#25853
TOTALS4984557-4059
📊

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