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BOSTON MARATHON 2025

Frederick Kostecki

Bib: 26301•M

MO

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Male)
#0 / 16105
Masters (Masters Men)
#0 / 10463
Division (M55-59)
#0 / 1648
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
10:05/mi
31:21
↑ 97↓ 3451.5%
10K· 6.21 mi
11:44/mi
1:07:47
↑ 79↓ 1380.4%
15K· 9.32 mi
12:34/mi
1:46:49
↑ 67↓ 78
20K· 12.43 mi
12:39/mi
2:26:08
↑ 106↓ 860.1%
Half· 13.11 mi
11:36/mi
2:34:03
↑ 19↓ 370.5%
25K· 15.53 mi
13:20/mi
3:06:23
↑ 66↓ 880.2%
30K· 18.64 mi
13:41/mi
3:48:54
↑ 181↓ 1480.2%
20M
14:23/mi
4:08:27
↑ 64↓ 500.2%
21M
14:45/mi
4:23:12
↑ 106↓ 241.6%
35K· 21.75 mi
13:07/mi
4:33:01
↑ 17↓ 861.7%
23M
13:55/mi
4:50:27
↑ 23↓ 630.6%
24M
12:53/mi
5:03:20
↓ 821.3%
40K· 24.85 mi
14:13/mi
5:15:29
↓ 200.3%
25.2M
14:15/mi
5:20:24
↑ 13↓ 160.2%
Finish· 26.22 mi
12:28/mi
5:33:06
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:34:03
Pace11:45 /mi
2nd Half
Distance13.11 mi
Time2:59:03
Pace13:40 /mi
📊Positive Split: 16.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:46:3031:2110:0531:21
10:05
-
10K
6.21 mi12:22:561:07:4710:5536:26
11:44
+1:39
15K
9.32 mi13:01:581:46:4911:2839:02
12:34
+0:50
20K
12.43 mi13:41:172:26:0811:4639:19
12:39
+0:05
Half
13.11 mi13:49:122:34:0311:457:55
11:36
-1:03
25K
15.53 mi14:21:323:06:2312:0032:20
13:20
+1:44
30K
18.64 mi15:04:033:48:5412:1742:31
13:41
+0:21
20M
20.00 mi15:23:364:08:2712:2519:33
14:23
+0:42
21M
21.00 mi15:38:214:23:1212:3214:45
14:45
+0:22
35K
21.75 mi15:48:104:33:0112:339:49
13:07
-1:38
23M
23.00 mi16:05:364:50:2712:3817:26
13:55
+0:48
24M
24.00 mi16:18:295:03:2012:3812:53
12:53
-1:02
40K
24.85 mi16:30:385:15:2912:4212:09
14:13
+1:20
25.2M
25.20 mi16:35:335:20:2412:434:55
14:15
+0:02
Finish
26.22 mi16:48:155:33:0612:4312:42
12:28
-1:47

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

10:05 /mi

Average Pace

12:43 /mi

Slowest Pace

14:45 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:28:24

27% of race

Time at Steady Pace

2:55:54

53% of race

Time at Slower Pace

1:08:48

21% of race

Average Pace: 12:42 /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 mi11:46:3031:2110:0531:21
10:05
#25800
10K
6.21 mi12:22:561:07:4710:5536:26
11:44
#27207
15K
9.32 mi13:01:581:46:4911:2839:02
12:34
#27588
20K
12.43 mi13:41:172:26:0811:4639:19
12:39
#27632
Half
13.11 mi13:49:122:34:0311:457:55
11:36
#27600
25K
15.53 mi14:21:323:06:2312:0032:20
13:20
#27598
30K
18.64 mi15:04:033:48:5412:1742:31
13:41
#27554
20M
20.00 mi15:23:364:08:2712:2519:33
14:23
#27555
21M
21.00 mi15:38:214:23:1212:3214:45
14:45
#27534
35K
21.75 mi15:48:104:33:0112:339:49
13:07
#27533
23M
23.00 mi16:05:364:50:2712:3817:26
13:55
#27529
24M
24.00 mi16:18:295:03:2012:3812:53
12:53
#27521
40K
24.85 mi16:30:385:15:2912:4212:09
14:13
#27522
25.2M
25.20 mi16:35:335:20:2412:434:55
14:15
#27512
Finish
26.22 mi16:48:155:33:0612:4312:42
12:28
#27522
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM55-59Seg. OverallSeg. MalesSeg. M55-59
5K3.11 mi3.11 mi25800150971509727967(Top 98%)15942(Top 99%)15942(Top 967%)
10K6.21 mi3.10 mi27207-140715659-56215659-56227779(Top 98%)15884(Top 99%)15884(Top 964%)
15K9.32 mi3.11 mi27588-38115809-15015809-15027967(Top 98%)15942(Top 99%)15942(Top 967%)
20K12.43 mi3.11 mi27632-4415813-415813-427630(Top 97%)15785(Top 98%)15785(Top 958%)
Half13.11 mi0.68 mi27600+3215799+1415799+1427149(Top 96%)15582(Top 97%)15582(Top 946%)
25K15.53 mi2.42 mi27598+215796+315796+327526(Top 97%)15725(Top 98%)15725(Top 954%)
30K18.64 mi3.11 mi27554+4415753+4315753+4327273(Top 96%)15563(Top 97%)15563(Top 944%)
20M20.00 mi1.36 mi27555-115743+1015743+1027576(Top 97%)15649(Top 97%)15649(Top 950%)
21M21.00 mi1.00 mi27534+2115730+1315730+1326944(Top 95%)15339(Top 95%)15339(Top 931%)
35K21.75 mi0.75 mi27533+115724+615724+627077(Top 95%)15379(Top 95%)15379(Top 933%)
23M23.00 mi1.25 mi27529+415722+215722+227256(Top 96%)15455(Top 96%)15455(Top 938%)
24M24.00 mi1.00 mi27521+815715+715715+726725(Top 94%)15165(Top 94%)15165(Top 920%)
40K24.85 mi0.85 mi27522-115712+315712+327346(Top 96%)15474(Top 96%)15474(Top 939%)
25.2M25.20 mi0.35 mi27512+1015707+515707+526554(Top 93%)15037(Top 93%)15037(Top 912%)
Finish26.22 mi1.02 mi27522-1015702+515702+527267(Top 96%)15444(Top 96%)15444(Top 937%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 98%
×21story building
+97ft-345ft

Overall

27967

Males

15942

M55-59

15942

5K→10K

3.1 - 6.2 mi

Top 98%
×5story building
+79ft-138ft

Overall

27779

Males

15884

M55-59

15884

10K→15K

6.2 - 9.3 mi

Top 98%
×3story building
+67ft-78ft

Overall

27967

Males

15942

M55-59

15942

15K→20K

9.3 - 12.4 mi

Top 97%
×5story building
+106ft-86ft

Overall

27630

Males

15785

M55-59

15785

20K→Half

12.4 - 13.1 mi

Top 96%
×2story building
+19ft-37ft

Overall

27149

Males

15582

M55-59

15582

Half→25K

13.1 - 15.5 mi

Top 97%
×4story building
+66ft-88ft

Overall

27526

Males

15725

M55-59

15725

25K→30K

15.5 - 18.6 mi

Top 96%
×9story building
+181ft-148ft

Overall

27273

Males

15563

M55-59

15563

30K→20M

18.6 - 20.0 mi

Top 97%
×5story building
+64ft-50ft

Overall

27576

Males

15649

M55-59

15649

20M→21M

20.0 - 21.0 mi

Top 95%
×8story building
+106ft-24ft

Overall

26944

Males

15339

M55-59

15339

21M→35K

21.0 - 21.8 mi

Top 95%
×7story building
+17ft-86ft

Overall

27077

Males

15379

M55-59

15379

35K→23M

21.8 - 23.0 mi

Top 96%
×5story building
+23ft-63ft

Overall

27256

Males

15455

M55-59

15455

23M→24M

23.0 - 24.0 mi

Top 94%
×6story building
+12ft-82ft

Overall

26725

Males

15165

M55-59

15165

24M→40K

24.0 - 24.9 mi

Top 96%
×1story
+6ft-20ft

Overall

27346

Males

15474

M55-59

15474

40K→25.2M

24.9 - 25.2 mi

Top 93%
×1story
+13ft-16ft

Overall

26554

Males

15037

M55-59

15037

25.2M→Finish

25.2 - 26.2 mi

Top 96%
×2story building
+22ft-21ft

Overall

27267

Males

15444

M55-59

15444

Passing Analysis

Category:
Athletes Passed
417
Passed By
2139
Net Change
-1722
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#25800
5K → 10K81415-1407#25800#27207
10K → 15K16397-381#27207#27588
15K → 20K57101-44#27588#27632
20K → Half364+32#27632#27600
Half → 25K6361+2#27600#27598
25K → 30K7834+44#27598#27554
30K → 20M3132-1#27554#27555
20M → 21M276+21#27555#27534
21M → 35K1615+1#27534#27533
35K → 23M2319+4#27533#27529
23M → 24M2113+8#27529#27521
24M → 40K1819-1#27521#27522
40K → 25.2M133+10#27522#27512
25.2M → Finish1020-10#27512#27522
TOTALS4172139-1722
📊

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