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BOSTON MARATHON 2025

Sean Zaleski

Bib: 5204•M

OH

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 9%
Gender (Male)
#0 / 16105
Top 15%
Masters (Masters Men)
#0 / 10463
Top 5%
Division (M40-44)
#0 / 2247
Top 14%
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
6:24/mi
19:52
↑ 97↓ 3451.5%
10K· 6.21 mi
6:24/mi
39:44
↑ 79↓ 1380.4%
15K· 9.32 mi
6:22/mi
59:30
↑ 67↓ 78
20K· 12.43 mi
6:29/mi
1:19:40
↑ 106↓ 860.1%
Half· 13.11 mi
6:23/mi
1:24:01
↑ 19↓ 370.5%
25K· 15.53 mi
6:28/mi
1:39:42
↑ 66↓ 880.2%
30K· 18.64 mi
6:38/mi
2:00:20
↑ 181↓ 1480.2%
20M
6:45/mi
2:09:31
↑ 64↓ 500.2%
21M
6:59/mi
2:16:30
↑ 106↓ 241.6%
35K· 21.75 mi
6:29/mi
2:21:21
↑ 17↓ 861.7%
23M
6:59/mi
2:30:06
↑ 23↓ 630.6%
24M
6:44/mi
2:36:50
↓ 821.3%
40K· 24.85 mi
6:53/mi
2:42:43
↓ 200.3%
25.2M
7:21/mi
2:45:15
↑ 13↓ 160.2%
Finish· 26.22 mi
6:31/mi
2:51:53
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:24:01
Pace6:25 /mi
2nd Half
Distance13.11 mi
Time1:27:52
Pace6:42 /mi
📊Positive Split: 4.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:23:1119:526:2419:52
6:24
-
10K
6.21 mi10:43:0339:446:2419:52
6:24
0:00
15K
9.32 mi11:02:4959:306:2319:46
6:22
-0:02
20K
12.43 mi11:22:591:19:406:2520:10
6:29
+0:07
Half
13.11 mi11:27:201:24:016:254:21
6:23
-0:06
25K
15.53 mi11:43:011:39:426:2515:41
6:28
+0:05
30K
18.64 mi12:03:392:00:206:2720:38
6:38
+0:10
20M
20.00 mi12:12:502:09:316:299:11
6:45
+0:07
21M
21.00 mi12:19:492:16:306:306:59
6:59
+0:14
35K
21.75 mi12:24:402:21:216:304:51
6:29
-0:30
23M
23.00 mi12:33:252:30:066:328:45
6:59
+0:30
24M
24.00 mi12:40:092:36:506:326:44
6:44
-0:15
40K
24.85 mi12:46:022:42:436:335:53
6:53
+0:09
25.2M
25.20 mi12:48:342:45:156:332:32
7:21
+0:28
Finish
26.22 mi12:55:122:51:536:346:38
6:31
-0:50

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

6:22 /mi

Average Pace

6:34 /mi

Slowest Pace

7:21 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:49:21

99% of race

Time at Steady Pace

2:32

1% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:33 /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 mi10:23:1119:526:2419:52
6:24
#3089
10K
6.21 mi10:43:0339:446:2419:52
6:24
#3027
15K
9.32 mi11:02:4959:306:2319:46
6:22
#2891
20K
12.43 mi11:22:591:19:406:2520:10
6:29
#2929
Half
13.11 mi11:27:201:24:016:254:21
6:23
#2925
25K
15.53 mi11:43:011:39:426:2515:41
6:28
#2853
30K
18.64 mi12:03:392:00:206:2720:38
6:38
#2748
20M
20.00 mi12:12:502:09:316:299:11
6:45
#2741
21M
21.00 mi12:19:492:16:306:306:59
6:59
#2670
35K
21.75 mi12:24:402:21:216:304:51
6:29
#2639
23M
23.00 mi12:33:252:30:066:328:45
6:59
#2663
24M
24.00 mi12:40:092:36:506:326:44
6:44
#2646
40K
24.85 mi12:46:022:42:436:335:53
6:53
#2647
25.2M
25.20 mi12:48:342:45:156:332:32
7:21
#2634
Finish
26.22 mi12:55:122:51:536:346:38
6:31
#2615
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi3089293429342710(Top 10%)2581(Top 16%)2581(Top 115%)
10K6.21 mi3.10 mi3027+622880+542880+543017(Top 11%)2873(Top 18%)2873(Top 128%)
15K9.32 mi3.11 mi2891+1362755+1252755+1252710(Top 10%)2581(Top 16%)2581(Top 115%)
20K12.43 mi3.11 mi2929-382791-362791-363077(Top 11%)2923(Top 18%)2923(Top 130%)
Half13.11 mi0.68 mi2925+42789+22789+22965(Top 10%)2832(Top 18%)2832(Top 126%)
25K15.53 mi2.42 mi2853+722721+682721+682731(Top 10%)2599(Top 16%)2599(Top 116%)
30K18.64 mi3.11 mi2748+1052620+1012620+1012613(Top 9%)2474(Top 15%)2474(Top 110%)
20M20.00 mi1.36 mi2741+72611+92611+92736(Top 10%)2565(Top 16%)2565(Top 114%)
21M21.00 mi1.00 mi2670+712543+682543+682210(Top 8%)2066(Top 13%)2066(Top 92%)
35K21.75 mi0.75 mi2639+312513+302513+302417(Top 9%)2260(Top 14%)2260(Top 101%)
23M23.00 mi1.25 mi2663-242530-172530-173697(Top 13%)3341(Top 21%)3341(Top 149%)
24M24.00 mi1.00 mi2646+172512+182512+183139(Top 11%)2835(Top 18%)2835(Top 126%)
40K24.85 mi0.85 mi2647-12509+32509+33273(Top 12%)2925(Top 18%)2925(Top 130%)
25.2M25.20 mi0.35 mi2634+132495+142495+142774(Top 10%)2476(Top 15%)2476(Top 110%)
Finish26.22 mi1.02 mi2615+192475+202475+202878(Top 10%)2573(Top 16%)2573(Top 115%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 10%
×21story building
+97ft-345ft

Overall

2710

Males

2581

M40-44

2581

5K→10K

3.1 - 6.2 mi

Top 11%
×5story building
+79ft-138ft

Overall

3017

Males

2873

M40-44

2873

10K→15K

6.2 - 9.3 mi

Top 10%
×3story building
+67ft-78ft

Overall

2710

Males

2581

M40-44

2581

15K→20K

9.3 - 12.4 mi

Top 11%
×5story building
+106ft-86ft

Overall

3077

Males

2923

M40-44

2923

20K→Half

12.4 - 13.1 mi

Top 10%
×2story building
+19ft-37ft

Overall

2965

Males

2832

M40-44

2832

Half→25K

13.1 - 15.5 mi

Top 10%
×4story building
+66ft-88ft

Overall

2731

Males

2599

M40-44

2599

25K→30K

15.5 - 18.6 mi

Top 9%
×9story building
+181ft-148ft

Overall

2613

Males

2474

M40-44

2474

30K→20M

18.6 - 20.0 mi

Top 10%
×5story building
+64ft-50ft

Overall

2736

Males

2565

M40-44

2565

20M→21M

20.0 - 21.0 mi

Top 8%
×8story building
+106ft-24ft

Overall

2210

Males

2066

M40-44

2066

21M→35K

21.0 - 21.8 mi

Top 9%
×7story building
+17ft-86ft

Overall

2417

Males

2260

M40-44

2260

35K→23M

21.8 - 23.0 mi

Top 13%
×5story building
+23ft-63ft

Overall

3697

Males

3341

M40-44

3341

23M→24M

23.0 - 24.0 mi

Top 11%
×6story building
+12ft-82ft

Overall

3139

Males

2835

M40-44

2835

24M→40K

24.0 - 24.9 mi

Top 12%
×1story
+6ft-20ft

Overall

3273

Males

2925

M40-44

2925

40K→25.2M

24.9 - 25.2 mi

Top 10%
×1story
+13ft-16ft

Overall

2774

Males

2476

M40-44

2476

25.2M→Finish

25.2 - 26.2 mi

Top 10%
×2story building
+22ft-21ft

Overall

2878

Males

2573

M40-44

2573

Passing Analysis

Category:
Athletes Passed
1067
Passed By
593
Net Change
+474
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#3089
5K → 10K16098+62#3089#3027
10K → 15K17135+136#3027#2891
15K → 20K68106-38#2891#2929
20K → Half2420+4#2929#2925
Half → 25K10129+72#2925#2853
25K → 30K15247+105#2853#2748
30K → 20M6053+7#2748#2741
20M → 21M9019+71#2741#2670
21M → 35K4514+31#2670#2639
35K → 23M4367-24#2639#2663
23M → 24M5336+17#2663#2646
24M → 40K3334-1#2646#2647
40K → 25.2M229+13#2647#2634
25.2M → Finish4526+19#2634#2615
TOTALS1067593+474
📊

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