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BOSTON MARATHON 2025

Derek Brozowski

MA

Bib: 31642 M

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

Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
469 ft elev
5K· 3.11 mi
8:54/mi
27:39
↑ 97↓ 3451.5%
220 ft elev
10K· 6.21 mi
8:52/mi
55:13
↑ 79↓ 1380.4%
157 ft elev
15K· 9.32 mi
8:39/mi
1:22:05
↑ 67↓ 78
146 ft elev
20K· 12.43 mi
8:39/mi
1:48:58
↑ 106↓ 860.1%
165 ft elev
Half· 13.11 mi
8:26/mi
1:54:43
↑ 19↓ 370.5%
148 ft elev
25K· 15.53 mi
8:49/mi
2:16:06
↑ 66↓ 880.2%
127 ft elev
30K· 18.64 mi
9:17/mi
2:44:56
↑ 181↓ 1480.2%
138 ft elev
20M
9:35/mi
2:57:58
↑ 64↓ 500.2%
148 ft elev
21M
10:45/mi
3:08:43
↑ 106↓ 241.6%
227 ft elev
35K· 21.75 mi
10:01/mi
3:16:13
↑ 17↓ 861.7%
156 ft elev
23M
10:01/mi
3:28:45
↑ 23↓ 630.6%
116 ft elev
24M
9:53/mi
3:38:38
↓ 821.3%
34 ft elev
40K· 24.85 mi
10:09/mi
3:47:19
↓ 200.3%
20 ft elev
25.2M
11:36/mi
3:51:19
↑ 13↓ 160.2%
18 ft elev
Finish· 26.22 mi
10:10/mi
4:01:41
↑ 22↓ 21
17 ft elev
Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:54:43
Pace8:45 /mi
2nd Half
Distance13.11 mi
Time2:06:58
Pace9:41 /mi
📊Positive Split: 10.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:50:1727:398:5427:39
8:54
-
10K
6.21 mi12:17:5155:138:5327:34
8:52
-0:02
15K
9.32 mi12:44:431:22:058:4826:52
8:39
-0:13
20K
12.43 mi13:11:361:48:588:4626:53
8:39
0:00
Half
13.11 mi13:17:211:54:438:455:45
8:26
-0:13
25K
15.53 mi13:38:442:16:068:4621:23
8:49
+0:23
30K
18.64 mi14:07:342:44:568:5128:50
9:17
+0:28
20M
20.00 mi14:20:362:57:588:5413:02
9:35
+0:18
21M
21.00 mi14:31:213:08:438:5910:45
10:45
+1:10
35K
21.75 mi14:38:513:16:139:017:30
10:01
-0:44
23M
23.00 mi14:51:233:28:459:0512:32
10:01
0:00
24M
24.00 mi15:01:163:38:389:079:53
9:53
-0:08
40K
24.85 mi15:09:573:47:199:098:41
10:09
+0:16
25.2M
25.20 mi15:13:573:51:199:114:00
11:36
+1:27
Finish
26.22 mi15:24:194:01:419:1310:22
10:10
-1:26

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

8:26 /mi

Average Pace

9:13 /mi

Slowest Pace

11:36 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:16:06

56% of race

Time at Steady Pace

1:11:47

30% of race

Time at Slower Pace

33:48

14% of race

Average Pace: 9:13 /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 mi11:50:1727:398:5427:39
8:54
#21987
10K
6.21 mi12:17:5155:138:5327:34
8:52
#21893
15K
9.32 mi12:44:431:22:058:4826:52
8:39
#21301
20K
12.43 mi13:11:361:48:588:4626:53
8:39
#20758
Half
13.11 mi13:17:211:54:438:455:45
8:26
#20674
25K
15.53 mi13:38:442:16:068:4621:23
8:49
#20413
30K
18.64 mi14:07:342:44:568:5128:50
9:17
#20123
20M
20.00 mi14:20:362:57:588:5413:02
9:35
#20071
21M
21.00 mi14:31:213:08:438:5910:45
10:45
#20128
35K
21.75 mi14:38:513:16:139:017:30
10:01
#20223
23M
23.00 mi14:51:233:28:459:0512:32
10:01
#20269
24M
24.00 mi15:01:163:38:389:079:53
9:53
#20340
40K
24.85 mi15:09:573:47:199:098:41
10:09
#20388
25.2M
25.20 mi15:13:573:51:199:114:00
11:36
#20461
Finish
26.22 mi15:24:194:01:419:1310:22
10:10
#20593
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi21987133101331020192(Top 71%)12595(Top 78%)12595(Top 223%)
10K6.21 mi3.10 mi21893+9413285+2513285+2521753(Top 77%)13240(Top 82%)13240(Top 235%)
15K9.32 mi3.11 mi21301+59213039+24613039+24620192(Top 71%)12595(Top 78%)12595(Top 223%)
20K12.43 mi3.11 mi20758+54312798+24112798+24119156(Top 67%)12107(Top 75%)12107(Top 215%)
Half13.11 mi0.68 mi20674+8412758+4012758+4018733(Top 66%)11942(Top 74%)11942(Top 212%)
25K15.53 mi2.42 mi20413+26112637+12112637+12119022(Top 67%)11984(Top 74%)11984(Top 212%)
30K18.64 mi3.11 mi20123+29012472+16512472+16519024(Top 67%)11843(Top 74%)11843(Top 210%)
20M20.00 mi1.36 mi20071+5212429+4312429+4319566(Top 69%)11954(Top 74%)11954(Top 212%)
21M21.00 mi1.00 mi20128-5712419+1012419+1020709(Top 73%)12357(Top 77%)12357(Top 219%)
35K21.75 mi0.75 mi20223-9512450-3112450-3121940(Top 77%)12866(Top 80%)12866(Top 228%)
23M23.00 mi1.25 mi20269-4612447+312447+320514(Top 72%)12161(Top 76%)12161(Top 216%)
24M24.00 mi1.00 mi20340-7112468-2112468-2120993(Top 74%)12343(Top 77%)12343(Top 219%)
40K24.85 mi0.85 mi20388-4812471-312471-320946(Top 74%)12256(Top 76%)12256(Top 217%)
25.2M25.20 mi0.35 mi20461-7312497-2612497-2622275(Top 78%)12925(Top 80%)12925(Top 229%)
Finish26.22 mi1.02 mi20593-13212545-4812545-4823437(Top 83%)13479(Top 84%)13479(Top 239%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 71%
×21story building
+97ft-345ft

Overall

20192

Males

12595

M18-39

12595

5K→10K

3.1 - 6.2 mi

Top 77%
×5story building
+79ft-138ft

Overall

21753

Males

13240

M18-39

13240

10K→15K

6.2 - 9.3 mi

Top 71%
×3story building
+67ft-78ft

Overall

20192

Males

12595

M18-39

12595

15K→20K

9.3 - 12.4 mi

Top 67%
×5story building
+106ft-86ft

Overall

19156

Males

12107

M18-39

12107

20K→Half

12.4 - 13.1 mi

Top 66%
×2story building
+19ft-37ft

Overall

18733

Males

11942

M18-39

11942

Half→25K

13.1 - 15.5 mi

Top 67%
×4story building
+66ft-88ft

Overall

19022

Males

11984

M18-39

11984

25K→30K

15.5 - 18.6 mi

Top 67%
×9story building
+181ft-148ft

Overall

19024

Males

11843

M18-39

11843

30K→20M

18.6 - 20.0 mi

Top 69%
×5story building
+64ft-50ft

Overall

19566

Males

11954

M18-39

11954

20M→21M

20.0 - 21.0 mi

Top 73%
×8story building
+106ft-24ft

Overall

20709

Males

12357

M18-39

12357

21M→35K

21.0 - 21.8 mi

Top 77%
×7story building
+17ft-86ft

Overall

21940

Males

12866

M18-39

12866

35K→23M

21.8 - 23.0 mi

Top 72%
×5story building
+23ft-63ft

Overall

20514

Males

12161

M18-39

12161

23M→24M

23.0 - 24.0 mi

Top 74%
×6story building
+12ft-82ft

Overall

20993

Males

12343

M18-39

12343

24M→40K

24.0 - 24.9 mi

Top 74%
×1story
+6ft-20ft

Overall

20946

Males

12256

M18-39

12256

40K→25.2M

24.9 - 25.2 mi

Top 78%
×1story
+13ft-16ft

Overall

22275

Males

12925

M18-39

12925

25.2M→Finish

25.2 - 26.2 mi

Top 83%
×2story building
+22ft-21ft

Overall

23437

Males

13479

M18-39

13479

Passing Analysis

Category:
Athletes Passed
2664
Passed By
1270
Net Change
+1394
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#21987
5K → 10K308214+94#21987#21893
10K → 15K62937+592#21893#21301
15K → 20K55411+543#21301#20758
20K → Half895+84#20758#20674
Half → 25K28928+261#20674#20413
25K → 30K38292+290#20413#20123
30K → 20M12472+52#20123#20071
20M → 21M75132-57#20071#20128
21M → 35K33128-95#20128#20223
35K → 23M75121-46#20223#20269
23M → 24M34105-71#20269#20340
24M → 40K4492-48#20340#20388
40K → 25.2M1083-73#20388#20461
25.2M → Finish18150-132#20461#20593
TOTALS26641270+1394
📊

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