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BOSTON MARATHON 2025

Marc Lozier

Bib: 5710•M

ON

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 28%
Gender (Male)
#0 / 16105
Top 41%
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
6:22/mi
19:47
↑ 97↓ 3451.5%
10K· 6.21 mi
6:32/mi
40:06
↑ 79↓ 1380.4%
15K· 9.32 mi
6:52/mi
1:01:25
↑ 67↓ 78
20K· 12.43 mi
7:19/mi
1:24:09
↑ 106↓ 860.1%
Half· 13.11 mi
7:20/mi
1:29:09
↑ 19↓ 370.5%
25K· 15.53 mi
8:19/mi
1:49:19
↑ 66↓ 880.2%
30K· 18.64 mi
8:07/mi
2:14:33
↑ 181↓ 1480.2%
20M
7:40/mi
2:24:58
↑ 64↓ 500.2%
21M
8:11/mi
2:33:09
↑ 106↓ 241.6%
35K· 21.75 mi
7:55/mi
2:39:04
↑ 17↓ 861.7%
23M
9:14/mi
2:50:38
↑ 23↓ 630.6%
24M
7:22/mi
2:58:00
↓ 821.3%
40K· 24.85 mi
6:42/mi
3:03:44
↓ 200.3%
25.2M
7:38/mi
3:06:22
↑ 13↓ 160.2%
Finish· 26.22 mi
6:21/mi
3:12:50
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:29:09
Pace6:48 /mi
2nd Half
Distance13.11 mi
Time1:43:41
Pace7:55 /mi
📊Positive Split: 16.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:24:5319:476:2219:47
6:22
-
10K
6.21 mi10:45:1240:066:2720:19
6:32
+0:10
15K
9.32 mi11:06:311:01:256:3521:19
6:52
+0:20
20K
12.43 mi11:29:151:24:096:4622:44
7:19
+0:27
Half
13.11 mi11:34:151:29:096:485:00
7:20
+0:01
25K
15.53 mi11:54:251:49:197:0220:10
8:19
+0:59
30K
18.64 mi12:19:392:14:337:1325:14
8:07
-0:12
20M
20.00 mi12:30:042:24:587:1510:25
7:40
-0:27
21M
21.00 mi12:38:152:33:097:188:11
8:11
+0:31
35K
21.75 mi12:44:102:39:047:195:55
7:55
-0:16
23M
23.00 mi12:55:442:50:387:2511:34
9:14
+1:19
24M
24.00 mi13:03:062:58:007:257:22
7:22
-1:52
40K
24.85 mi13:08:503:03:447:245:44
6:42
-0:40
25.2M
25.20 mi13:11:283:06:227:242:38
7:38
+0:56
Finish
26.22 mi13:17:563:12:507:226:28
6:21
-1:17

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

6:21 /mi

Average Pace

7:22 /mi

Slowest Pace

9:14 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:13:37

38% of race

Time at Steady Pace

48:09

25% of race

Time at Slower Pace

1:11:04

37% of race

Average Pace: 7:21 /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 mi10:24:5319:476:2219:47
6:22
#2892
10K
6.21 mi10:45:1240:066:2720:19
6:32
#3436
15K
9.32 mi11:06:311:01:256:3521:19
6:52
#4325
20K
12.43 mi11:29:151:24:096:4622:44
7:19
#5682
Half
13.11 mi11:34:151:29:096:485:00
7:20
#5961
25K
15.53 mi11:54:251:49:197:0220:10
8:19
#7500
30K
18.64 mi12:19:392:14:337:1325:14
8:07
#8160
20M
20.00 mi12:30:042:24:587:1510:25
7:40
#8114
21M
21.00 mi12:38:152:33:097:188:11
8:11
#8074
35K
21.75 mi12:44:102:39:047:195:55
7:55
#8171
23M
23.00 mi12:55:442:50:387:2511:34
9:14
#8793
24M
24.00 mi13:03:062:58:007:257:22
7:22
#8670
40K
24.85 mi13:08:503:03:447:245:44
6:42
#8297
25.2M
25.20 mi13:11:283:06:227:242:38
7:38
#8205
Finish
26.22 mi13:17:563:12:507:226:28
6:21
#7842
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi2892275327536684(Top 24%)6011(Top 37%)6011(Top 107%)
10K6.21 mi3.10 mi3436-5443263-5103263-5104014(Top 14%)3779(Top 23%)3779(Top 67%)
15K9.32 mi3.11 mi4325-8894067-8044067-8046684(Top 24%)6011(Top 37%)6011(Top 107%)
20K12.43 mi3.11 mi5682-13575218-11515218-11519165(Top 32%)7537(Top 47%)7537(Top 134%)
Half13.11 mi0.68 mi5961-2795450-2325450-23210159(Top 36%)8075(Top 50%)8075(Top 143%)
25K15.53 mi2.42 mi7500-15396610-11606610-116016008(Top 56%)10643(Top 66%)10643(Top 189%)
30K18.64 mi3.11 mi8160-6606966-3566966-35612238(Top 43%)8793(Top 55%)8793(Top 156%)
20M20.00 mi1.36 mi8114+466908+586908+588108(Top 29%)6506(Top 40%)6506(Top 115%)
21M21.00 mi1.00 mi8074+406852+566852+568444(Top 30%)6504(Top 40%)6504(Top 115%)
35K21.75 mi0.75 mi8171-976896-446896-4411568(Top 41%)8103(Top 50%)8103(Top 144%)
23M23.00 mi1.25 mi8793-6227218-3227218-32217486(Top 62%)10721(Top 67%)10721(Top 190%)
24M24.00 mi1.00 mi8670+1237112+1067112+1066824(Top 24%)5423(Top 34%)5423(Top 96%)
40K24.85 mi0.85 mi8297+3736858+2546858+2542427(Top 9%)2224(Top 14%)2224(Top 39%)
25.2M25.20 mi0.35 mi8205+926789+696789+694085(Top 14%)3501(Top 22%)3501(Top 62%)
Finish26.22 mi1.02 mi7842+3636531+2586531+2582100(Top 7%)1927(Top 12%)1927(Top 34%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 24%
×21story building
+97ft-345ft

Overall

6684

Males

6011

M18-39

6011

5K→10K

3.1 - 6.2 mi

Top 14%
×5story building
+79ft-138ft

Overall

4014

Males

3779

M18-39

3779

10K→15K

6.2 - 9.3 mi

Top 24%
×3story building
+67ft-78ft

Overall

6684

Males

6011

M18-39

6011

15K→20K

9.3 - 12.4 mi

Top 32%
×5story building
+106ft-86ft

Overall

9165

Males

7537

M18-39

7537

20K→Half

12.4 - 13.1 mi

Top 36%
×2story building
+19ft-37ft

Overall

10159

Males

8075

M18-39

8075

Half→25K

13.1 - 15.5 mi

Top 56%
×4story building
+66ft-88ft

Overall

16008

Males

10643

M18-39

10643

25K→30K

15.5 - 18.6 mi

Top 43%
×9story building
+181ft-148ft

Overall

12238

Males

8793

M18-39

8793

30K→20M

18.6 - 20.0 mi

Top 29%
×5story building
+64ft-50ft

Overall

8108

Males

6506

M18-39

6506

20M→21M

20.0 - 21.0 mi

Top 30%
×8story building
+106ft-24ft

Overall

8444

Males

6504

M18-39

6504

21M→35K

21.0 - 21.8 mi

Top 41%
×7story building
+17ft-86ft

Overall

11568

Males

8103

M18-39

8103

35K→23M

21.8 - 23.0 mi

Top 62%
×5story building
+23ft-63ft

Overall

17486

Males

10721

M18-39

10721

23M→24M

23.0 - 24.0 mi

Top 24%
×6story building
+12ft-82ft

Overall

6824

Males

5423

M18-39

5423

24M→40K

24.0 - 24.9 mi

Top 9%
×1story
+6ft-20ft

Overall

2427

Males

2224

M18-39

2224

40K→25.2M

24.9 - 25.2 mi

Top 14%
×1story
+13ft-16ft

Overall

4085

Males

3501

M18-39

3501

25.2M→Finish

25.2 - 26.2 mi

Top 7%
×2story building
+22ft-21ft

Overall

2100

Males

1927

M18-39

1927

Passing Analysis

Category:
Athletes Passed
1377
Passed By
6327
Net Change
-4950
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#2892
5K → 10K20564-544#2892#3436
10K → 15K5894-889#3436#4325
15K → 20K91366-1357#4325#5682
20K → Half2281-279#5682#5961
Half → 25K51544-1539#5961#7500
25K → 30K61721-660#7500#8160
30K → 20M12276+46#8160#8114
20M → 21M11676+40#8114#8074
21M → 35K41138-97#8074#8171
35K → 23M27649-622#8171#8793
23M → 24M14017+123#8793#8670
24M → 40K3730+373#8670#8297
40K → 25.2M920+92#8297#8205
25.2M → Finish3641+363#8205#7842
TOTALS13776327-4950
📊

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