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BOSTON MARATHON 2025

Brian Lozes

Bib: 1574•M

CO

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 10%
Gender (Male)
#0 / 16105
Top 16%
Division (M18-39)
#0 / 5642
Top 37%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
18:45
Rank: #1185
Start → 5K
6:02/mi
18:45 split
10K· 6.21 mi
37:17
Rank: #1072 (+113)
5K → 10K
5:58/mi
18:32 split
15K· 9.32 mi
55:54
Rank: #1044 (+28)
10K → 15K
6:00/mi
18:37 split
20K· 12.43 mi
1:14:54
Rank: #1070 (-26)
15K → 20K
6:07/mi
19:00 split
Half· 13.11 mi
1:19:02
Rank: #1077 (-7)
20K → Half
6:03/mi
4:08 split
25K· 15.53 mi
1:34:12
Rank: #1140 (-63)
Half → 25K
6:15/mi
15:10 split
30K· 18.64 mi
1:55:21
Rank: #1435 (-295)
25K → 30K
6:48/mi
21:09 split
20M
2:05:04
Rank: #1616 (-181)
30K → 20M
7:09/mi
9:43 split
21M
2:12:44
Rank: #1769 (-153)
20M → 21M
7:40/mi
7:40 split
35K· 21.75 mi
2:18:21
Rank: #1928 (-159)
21M → 35K
7:30/mi
5:37 split
23M
2:29:14
Rank: #2462 (-534)
35K → 23M
8:42/mi
10:53 split
24M
2:36:42
Rank: #2615 (-153)
23M → 24M
7:28/mi
7:28 split
40K· 24.85 mi
2:43:07
Rank: #2709 (-94)
24M → 40K
7:30/mi
6:25 split
25.2M
2:45:50
Rank: #2732 (-23)
40K → 25.2M
7:53/mi
2:43 split
Finish· 26.22 mi
2:52:36
Rank: #2737 (-5)
25.2M → Finish
6:38/mi
6:46 split

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:19:02
Pace6:02 /mi
2nd Half
Distance13.11 mi
Time1:33:34
Pace7:08 /mi
📊Positive Split: 18.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:19:4118:456:0218:45
6:02
-
10K
6.21 mi10:38:1337:176:0018:32
5:58
-0:04
15K
9.32 mi10:56:5055:546:0018:37
6:00
+0:02
20K
12.43 mi11:15:501:14:546:0219:00
6:07
+0:07
Half
13.11 mi11:19:581:19:026:024:08
6:03
-0:04
25K
15.53 mi11:35:081:34:126:0415:10
6:15
+0:12
30K
18.64 mi11:56:171:55:216:1121:09
6:48
+0:33
20M
20.00 mi12:06:002:05:046:159:43
7:09
+0:21
21M
21.00 mi12:13:402:12:446:197:40
7:40
+0:31
35K
21.75 mi12:19:172:18:216:225:37
7:30
-0:10
23M
23.00 mi12:30:102:29:146:2910:53
8:42
+1:12
24M
24.00 mi12:37:382:36:426:327:28
7:28
-1:14
40K
24.85 mi12:44:032:43:076:346:25
7:30
+0:02
25.2M
25.20 mi12:46:462:45:506:352:43
7:53
+0:23
Finish
26.22 mi12:53:322:52:366:356:46
6:38
-1:15

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

5:58 /mi

Average Pace

6:35 /mi

Slowest Pace

8:42 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:34:12

55% of race

Time at Steady Pace

37:38

22% of race

Time at Slower Pace

40:46

24% of race

Average Pace: 6:35 /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 mi10:19:4118:456:0218:45
6:02
#1185
10K
6.21 mi10:38:1337:176:0018:32
5:58
#1072
15K
9.32 mi10:56:5055:546:0018:37
6:00
#1044
20K
12.43 mi11:15:501:14:546:0219:00
6:07
#1070
Half
13.11 mi11:19:581:19:026:024:08
6:03
#1077
25K
15.53 mi11:35:081:34:126:0415:10
6:15
#1140
30K
18.64 mi11:56:171:55:216:1121:09
6:48
#1435
20M
20.00 mi12:06:002:05:046:159:43
7:09
#1616
21M
21.00 mi12:13:402:12:446:197:40
7:40
#1769
35K
21.75 mi12:19:172:18:216:225:37
7:30
#1928
23M
23.00 mi12:30:102:29:146:2910:53
8:42
#2462
24M
24.00 mi12:37:382:36:426:327:28
7:28
#2615
40K
24.85 mi12:44:032:43:076:346:25
7:30
#2709
25.2M
25.20 mi12:46:462:45:506:352:43
7:53
#2732
Finish
26.22 mi12:53:322:52:366:356:46
6:38
#2737
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi1185112111211013(Top 4%)958(Top 6%)958(Top 17%)
10K6.21 mi3.10 mi1072+1131011+1101011+1101017(Top 4%)960(Top 6%)960(Top 17%)
15K9.32 mi3.11 mi1044+28984+27984+271013(Top 4%)958(Top 6%)958(Top 17%)
20K12.43 mi3.11 mi1070-261010-261010-261235(Top 4%)1170(Top 7%)1170(Top 21%)
Half13.11 mi0.68 mi1077-71017-71017-71396(Top 5%)1328(Top 8%)1328(Top 24%)
25K15.53 mi2.42 mi1140-631078-611078-611673(Top 6%)1590(Top 10%)1590(Top 28%)
30K18.64 mi3.11 mi1435-2951357-2791357-2793474(Top 12%)3229(Top 20%)3229(Top 57%)
20M20.00 mi1.36 mi1616-1811531-1741531-1744906(Top 17%)4409(Top 27%)4409(Top 78%)
21M21.00 mi1.00 mi1769-1531680-1491680-1495435(Top 19%)4681(Top 29%)4681(Top 83%)
35K21.75 mi0.75 mi1928-1591832-1521832-1528609(Top 30%)6618(Top 41%)6618(Top 117%)
23M23.00 mi1.25 mi2462-5342344-5122344-51214469(Top 51%)9375(Top 58%)9375(Top 166%)
24M24.00 mi1.00 mi2615-1532482-1382482-1387410(Top 26%)5757(Top 36%)5757(Top 102%)
40K24.85 mi0.85 mi2709-942567-852567-856793(Top 24%)5298(Top 33%)5298(Top 94%)
25.2M25.20 mi0.35 mi2732-232587-202587-205183(Top 18%)4204(Top 26%)4204(Top 75%)
Finish26.22 mi1.02 mi2737-52589-22589-23524(Top 12%)3071(Top 19%)3071(Top 54%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 4%
×21story building
+97ft-345ft

Overall

1013

Males

958

M18-39

958

5K→10K

3.1 - 6.2 mi

Top 4%
×5story building
+79ft-138ft

Overall

1017

Males

960

M18-39

960

10K→15K

6.2 - 9.3 mi

Top 4%
×3story building
+67ft-78ft

Overall

1013

Males

958

M18-39

958

15K→20K

9.3 - 12.4 mi

Top 4%
×5story building
+106ft-86ft

Overall

1235

Males

1170

M18-39

1170

20K→Half

12.4 - 13.1 mi

Top 5%
×2story building
+19ft-37ft

Overall

1396

Males

1328

M18-39

1328

Half→25K

13.1 - 15.5 mi

Top 6%
×4story building
+66ft-88ft

Overall

1673

Males

1590

M18-39

1590

25K→30K

15.5 - 18.6 mi

Top 12%
×9story building
+181ft-148ft

Overall

3474

Males

3229

M18-39

3229

30K→20M

18.6 - 20.0 mi

Top 17%
×5story building
+64ft-50ft

Overall

4906

Males

4409

M18-39

4409

20M→21M

20.0 - 21.0 mi

Top 19%
×8story building
+106ft-24ft

Overall

5435

Males

4681

M18-39

4681

21M→35K

21.0 - 21.8 mi

Top 30%
×7story building
+17ft-86ft

Overall

8609

Males

6618

M18-39

6618

35K→23M

21.8 - 23.0 mi

Top 51%
×5story building
+23ft-63ft

Overall

14469

Males

9375

M18-39

9375

23M→24M

23.0 - 24.0 mi

Top 26%
×6story building
+12ft-82ft

Overall

7410

Males

5757

M18-39

5757

24M→40K

24.0 - 24.9 mi

Top 24%
×1story
+6ft-20ft

Overall

6793

Males

5298

M18-39

5298

40K→25.2M

24.9 - 25.2 mi

Top 18%
×1story
+13ft-16ft

Overall

5183

Males

4204

M18-39

4204

25.2M→Finish

25.2 - 26.2 mi

Top 12%
×2story building
+22ft-21ft

Overall

3524

Males

3071

M18-39

3071

Passing Analysis

Category:
Athletes Passed
340
Passed By
1892
Net Change
-1552
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#1185
5K → 10K13320+113#1185#1072
10K → 15K4921+28#1072#1044
15K → 20K2248-26#1044#1070
20K → Half613-7#1070#1077
Half → 25K1780-63#1077#1140
25K → 30K8303-295#1140#1435
30K → 20M7188-181#1435#1616
20M → 21M10163-153#1616#1769
21M → 35K6165-159#1769#1928
35K → 23M3537-534#1928#2462
23M → 24M17170-153#2462#2615
24M → 40K20114-94#2615#2709
40K → 25.2M932-23#2709#2732
25.2M → Finish3338-5#2732#2737
TOTALS3401892-1552
📊

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