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BOSTON MARATHON 2025

Nathan Krusko

MA

Bib: 27566 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
8:26/mi
26:12
↑ 97↓ 3451.5%
220 ft elev
10K· 6.21 mi
7:53/mi
50:43
↑ 79↓ 1380.4%
157 ft elev
15K· 9.32 mi
7:59/mi
1:15:30
↑ 67↓ 78
146 ft elev
20K· 12.43 mi
8:19/mi
1:41:21
↑ 106↓ 860.1%
165 ft elev
Half· 13.11 mi
8:36/mi
1:47:13
↑ 19↓ 370.5%
148 ft elev
25K· 15.53 mi
9:14/mi
2:09:36
↑ 66↓ 880.2%
127 ft elev
30K· 18.64 mi
10:38/mi
2:42:38
↑ 181↓ 1480.2%
138 ft elev
20M
11:52/mi
2:58:46
↑ 64↓ 500.2%
148 ft elev
21M
12:10/mi
3:10:56
↑ 106↓ 241.6%
227 ft elev
35K· 21.75 mi
12:02/mi
3:19:56
↑ 17↓ 861.7%
156 ft elev
23M
12:52/mi
3:36:02
↑ 23↓ 630.6%
116 ft elev
24M
14:46/mi
3:50:48
↓ 821.3%
34 ft elev
40K· 24.85 mi
12:19/mi
4:01:20
↓ 200.3%
20 ft elev
25.2M
12:22/mi
4:05:36
↑ 13↓ 160.2%
18 ft elev
Finish· 26.22 mi
10:50/mi
4:16:38
↑ 22↓ 21
17 ft elev
Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent

The Course

Half Splits

1st Half· via Half
1:47:138:11 /mi⚡ faster
2nd Half
2:29:2511:24 /mi+39.4%
Positive split — 39.4% slower in the second half
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Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:43:4426:128:2626:12
8:26
-
10K
6.21 mi12:08:1550:438:1024:31
7:53
-0:33
15K
9.32 mi12:33:021:15:308:0624:47
7:59
+0:06
20K
12.43 mi12:58:531:41:218:0925:51
8:19
+0:20
Half
13.11 mi13:04:451:47:138:115:52
8:36
+0:17
25K
15.53 mi13:27:082:09:368:2122:23
9:14
+0:38
30K
18.64 mi14:00:102:42:388:4333:02
10:38
+1:24
20M
20.00 mi14:16:182:58:468:5616:08
11:52
+1:14
21M
21.00 mi14:28:283:10:569:0612:10
12:10
+0:18
35K
21.75 mi14:37:283:19:569:129:00
12:02
-0:08
23M
23.00 mi14:53:343:36:029:2416:06
12:52
+0:50
24M
24.00 mi15:08:203:50:489:3714:46
14:46
+1:54
40K
24.85 mi15:18:524:01:209:4310:32
12:19
-2:27
25.2M
25.20 mi15:23:084:05:369:454:16
12:22
+0:03
Finish
26.22 mi15:34:104:16:389:4811:02
10:50
-1:32

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

7:53 /mi

Average Pace

9:48 /mi

Slowest Pace

14:46 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:09:36

51% of race

Time at Steady Pace

1:00:12

23% of race

Time at Slower Pace

1:06:50

26% of race

Average Pace: 9:47 /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 mi11:43:4426:128:2626:12
8:26
#19485
10K
6.21 mi12:08:1550:438:1024:31
7:53
#17704
15K
9.32 mi12:33:021:15:308:0624:47
7:59
#17080
20K
12.43 mi12:58:531:41:218:0925:51
8:19
#17075
Half
13.11 mi13:04:451:47:138:115:52
8:36
#17187
25K
15.53 mi13:27:082:09:368:2122:23
9:14
#17880
30K
18.64 mi14:00:102:42:388:4333:02
10:38
#19463
20M
20.00 mi14:16:182:58:468:5616:08
11:52
#20259
21M
21.00 mi14:28:283:10:569:0612:10
12:10
#20609
35K
21.75 mi14:37:283:19:569:129:00
12:02
#21002
23M
23.00 mi14:53:343:36:029:2416:06
12:52
#21593
24M
24.00 mi15:08:203:50:489:3714:46
14:46
#22237
40K
24.85 mi15:18:524:01:209:4310:32
12:19
#22400
25.2M
25.20 mi15:23:084:05:369:454:16
12:22
#22433
Finish
26.22 mi15:34:104:16:389:4811:02
10:50
#22551
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi194851224612246158651074810748
10K6.21 mi3.10 mi17704+178111506+74011506+740155971066910669
15K9.32 mi3.11 mi17080+62411270+23611270+236158651074810748
20K12.43 mi3.11 mi17075+511236+3411236+34170481120611206
Half13.11 mi0.68 mi17187-11211284-4811284-48198091240212402
25K15.53 mi2.42 mi17880-69311545-26111545-261209001281112811
30K18.64 mi3.11 mi19463-158312189-64412189-644232291371613716
20M20.00 mi1.36 mi20259-79612504-31512504-315250781449614496
21M21.00 mi1.00 mi20609-35012645-14112645-141238681385213852
35K21.75 mi0.75 mi21002-39312811-16612811-166259021477914779
23M23.00 mi1.25 mi21593-59113051-24013051-240262201494614946
24M24.00 mi1.00 mi22237-64413299-24813299-248279841582215822
40K24.85 mi0.85 mi22400-16313361-6213361-62254031446914469
25.2M25.20 mi0.35 mi22433-3313367-613367-6239301373213732
Finish26.22 mi1.02 mi22551-11813401-3413401-34250111428214282

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 56%
×21story building
+97ft-345ft

Overall

15865

Males

10748

M18-39

10748

5K→10K

3.1 - 6.2 mi

Top 55%
×5story building
+79ft-138ft

Overall

15597

Males

10669

M18-39

10669

10K→15K

6.2 - 9.3 mi

Top 56%
×3story building
+67ft-78ft

Overall

15865

Males

10748

M18-39

10748

15K→20K

9.3 - 12.4 mi

Top 60%
×5story building
+106ft-86ft

Overall

17048

Males

11206

M18-39

11206

20K→Half

12.4 - 13.1 mi

Top 70%
×2story building
+19ft-37ft

Overall

19809

Males

12402

M18-39

12402

Half→25K

13.1 - 15.5 mi

Top 74%
×4story building
+66ft-88ft

Overall

20900

Males

12811

M18-39

12811

25K→30K

15.5 - 18.6 mi

Top 82%
×9story building
+181ft-148ft

Overall

23229

Males

13716

M18-39

13716

30K→20M

18.6 - 20.0 mi

Top 88%
×5story building
+64ft-50ft

Overall

25078

Males

14496

M18-39

14496

20M→21M

20.0 - 21.0 mi

Top 84%
×8story building
+106ft-24ft

Overall

23868

Males

13852

M18-39

13852

21M→35K

21.0 - 21.8 mi

Top 91%
×7story building
+17ft-86ft

Overall

25902

Males

14779

M18-39

14779

35K→23M

21.8 - 23.0 mi

Top 92%
×5story building
+23ft-63ft

Overall

26220

Males

14946

M18-39

14946

23M→24M

23.0 - 24.0 mi

Top 99%
×6story building
+12ft-82ft

Overall

27984

Males

15822

M18-39

15822

24M→40K

24.0 - 24.9 mi

Top 89%
×1story
+6ft-20ft

Overall

25403

Males

14469

M18-39

14469

40K→25.2M

24.9 - 25.2 mi

Top 84%
×1story
+13ft-16ft

Overall

23930

Males

13732

M18-39

13732

25.2M→Finish

25.2 - 26.2 mi

Top 88%
×2story building
+22ft-21ft

Overall

25011

Males

14282

M18-39

14282

Passing Analysis

Category:
Athletes Passed
2822
Passed By
5888
Net Change
-3066
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#19485
5K → 10K17865+1781#19485#17704
10K → 15K64824+624#17704#17080
15K → 20K197192+5#17080#17075
20K → Half9121-112#17075#17187
Half → 25K47740-693#17187#17880
25K → 30K271610-1583#17880#19463
30K → 20M13809-796#19463#20259
20M → 21M26376-350#20259#20609
21M → 35K9402-393#20609#21002
35K → 23M18609-591#21002#21593
23M → 24M3647-644#21593#22237
24M → 40K13176-163#22237#22400
40K → 25.2M740-33#22400#22433
25.2M → Finish19137-118#22433#22551
TOTALS28225888-3066

Passing Charts

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