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BOSTON MARATHON 2025

Nikolai Chakhlevitch

Bib: 6549•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

Start
0:00:00
Race begins
5K· 3.11 mi
22:02
Rank: #8559
Start → 5K
22:02 | 7:06/mi
10K· 6.21 mi
45:25
Rank: #10418 (-1859)
5K → 10K
23:23 | 7:32/mi
15K· 9.32 mi
1:09:16
Rank: #11360 (-942)
10K → 15K
23:51 | 7:41/mi
20K· 12.43 mi
1:34:23
Rank: #12447 (-1087)
15K → 20K
25:07 | 8:05/mi
Half· 13.11 mi
1:39:34
Rank: #12456 (-9)
20K → Half
5:11 | 7:36/mi
25K· 15.53 mi
2:00:35
Rank: #13548 (-1092)
Half → 25K
21:01 | 8:40/mi
30K· 18.64 mi
2:29:34
Rank: #14919 (-1371)
25K → 30K
28:59 | 9:20/mi
20M
2:42:28
Rank: #15311 (-392)
30K → 20M
12:54 | 9:30/mi
21M
2:51:58
Rank: #15322 (-11)
20M → 21M
9:30 | 9:30/mi
35K· 21.75 mi
2:58:16
Rank: #15277 (+45)
21M → 35K
6:18 | 8:25/mi
23M
3:09:34
Rank: #15324 (-47)
35K → 23M
11:18 | 9:02/mi
24M
3:18:06
Rank: #15279 (+45)
23M → 24M
8:32 | 8:32/mi
40K· 24.85 mi
3:26:03
Rank: #15380 (-101)
24M → 40K
7:57 | 9:18/mi
25.2M
3:29:53
Rank: #15483 (-103)
40K → 25.2M
3:50 | 11:07/mi
Finish· 26.22 mi
3:37:39
Rank: #15297 (+186)
25.2M → Finish
7:46 | 7:37/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:39:34
Pace7:36 /mi
2nd Half
Distance13.11 mi
Time1:58:05
Pace9:00 /mi
📊Positive Split: 18.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:27:0022:027:0622:02
7:06
-
10K
6.21 mi10:50:2345:257:1923:23
7:32
+0:26
15K
9.32 mi11:14:141:09:167:2623:51
7:41
+0:09
20K
12.43 mi11:39:211:34:237:3625:07
8:05
+0:24
Half
13.11 mi11:44:321:39:347:365:11
7:36
-0:29
25K
15.53 mi12:05:332:00:357:4621:01
8:40
+1:04
30K
18.64 mi12:34:322:29:348:0128:59
9:20
+0:40
20M
20.00 mi12:47:262:42:288:0712:54
9:30
+0:10
21M
21.00 mi12:56:562:51:588:119:30
9:30
0:00
35K
21.75 mi13:03:142:58:168:126:18
8:25
-1:05
23M
23.00 mi13:14:323:09:348:1511:18
9:02
+0:37
24M
24.00 mi13:23:043:18:068:158:32
8:32
-0:30
40K
24.85 mi13:31:013:26:038:177:57
9:18
+0:46
25.2M
25.20 mi13:34:513:29:538:203:50
11:07
+1:49
Finish
26.22 mi13:42:373:37:398:187:46
7:37
-3:30

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

7:06 /mi

Average Pace

8:18 /mi

Slowest Pace

11:07 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:22:13

38% of race

Time at Steady Pace

1:12:16

33% of race

Time at Slower Pace

1:03:10

29% of race

Average Pace: 8:18 /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 mi10:27:0022:027:0622:02
7:06
#8559
10K
6.21 mi10:50:2345:257:1923:23
7:32
#10418
15K
9.32 mi11:14:141:09:167:2623:51
7:41
#11360
20K
12.43 mi11:39:211:34:237:3625:07
8:05
#12447
Half
13.11 mi11:44:321:39:347:365:11
7:36
#12456
25K
15.53 mi12:05:332:00:357:4621:01
8:40
#13548
30K
18.64 mi12:34:322:29:348:0128:59
9:20
#14919
20M
20.00 mi12:47:262:42:288:0712:54
9:30
#15311
21M
21.00 mi12:56:562:51:588:119:30
9:30
#15322
35K
21.75 mi13:03:142:58:168:126:18
8:25
#15277
23M
23.00 mi13:14:323:09:348:1511:18
9:02
#15324
24M
24.00 mi13:23:043:18:068:158:32
8:32
#15279
40K
24.85 mi13:31:013:26:038:177:57
9:18
#15380
25.2M
25.20 mi13:34:513:29:538:203:50
11:07
#15483
Finish
26.22 mi13:42:373:37:398:187:46
7:37
#15297
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi85597360736013250(Top 47%)9634(Top 60%)9634(Top 171%)
10K6.21 mi3.10 mi10418-18598380-10208380-102012332(Top 43%)9306(Top 58%)9306(Top 165%)
15K9.32 mi3.11 mi11360-9428827-4478827-44713250(Top 47%)9634(Top 60%)9634(Top 171%)
20K12.43 mi3.11 mi12447-10879297-4709297-47015515(Top 55%)10550(Top 66%)10550(Top 187%)
Half13.11 mi0.68 mi12456-99296+19296+112542(Top 44%)9272(Top 58%)9272(Top 164%)
25K15.53 mi2.42 mi13548-10929720-4249720-42418177(Top 64%)11600(Top 72%)11600(Top 206%)
30K18.64 mi3.11 mi14919-137110250-53010250-53019229(Top 68%)11934(Top 74%)11934(Top 212%)
20M20.00 mi1.36 mi15311-39210403-15310403-15319119(Top 67%)11736(Top 73%)11736(Top 208%)
21M21.00 mi1.00 mi15322-1110375+2810375+2816053(Top 57%)10277(Top 64%)10277(Top 182%)
35K21.75 mi0.75 mi15277+4510340+3510340+3514961(Top 53%)9710(Top 60%)9710(Top 172%)
23M23.00 mi1.25 mi15324-4710313+2710313+2716395(Top 58%)10237(Top 64%)10237(Top 181%)
24M24.00 mi1.00 mi15279+4510271+4210271+4214715(Top 52%)9458(Top 59%)9458(Top 168%)
40K24.85 mi0.85 mi15380-10110282-1110282-1117819(Top 63%)10724(Top 67%)10724(Top 190%)
25.2M25.20 mi0.35 mi15483-10310312-3010312-3020942(Top 74%)12250(Top 76%)12250(Top 217%)
Finish26.22 mi1.02 mi15297+18610208+10410208+10410110(Top 36%)7047(Top 44%)7047(Top 125%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 47%
×21stories
+97ft-345ft

Overall

13250

Males

9634

M18-39

9634

5K→10K

3.1 - 6.2 mi

Top 43%
×5stories
+79ft-138ft

Overall

12332

Males

9306

M18-39

9306

10K→15K

6.2 - 9.3 mi

Top 47%
×3stories
+67ft-78ft

Overall

13250

Males

9634

M18-39

9634

15K→20K

9.3 - 12.4 mi

Top 55%
×5stories
+106ft-86ft

Overall

15515

Males

10550

M18-39

10550

20K→Half

12.4 - 13.1 mi

Top 44%
×2stories
+19ft-37ft

Overall

12542

Males

9272

M18-39

9272

Half→25K

13.1 - 15.5 mi

Top 64%
×4stories
+66ft-88ft

Overall

18177

Males

11600

M18-39

11600

25K→30K

15.5 - 18.6 mi

Top 68%
×9stories
+181ft-148ft

Overall

19229

Males

11934

M18-39

11934

30K→20M

18.6 - 20.0 mi

Top 67%
×5stories
+64ft-50ft

Overall

19119

Males

11736

M18-39

11736

20M→21M

20.0 - 21.0 mi

Top 57%
×8stories
+106ft-24ft

Overall

16053

Males

10277

M18-39

10277

21M→35K

21.0 - 21.8 mi

Top 53%
×7stories
+17ft-86ft

Overall

14961

Males

9710

M18-39

9710

35K→23M

21.8 - 23.0 mi

Top 58%
×5stories
+23ft-63ft

Overall

16395

Males

10237

M18-39

10237

23M→24M

23.0 - 24.0 mi

Top 52%
×6stories
+12ft-82ft

Overall

14715

Males

9458

M18-39

9458

24M→40K

24.0 - 24.9 mi

Top 63%
×1story
+6ft-20ft

Overall

17819

Males

10724

M18-39

10724

40K→25.2M

24.9 - 25.2 mi

Top 74%
×1story
+13ft-16ft

Overall

20942

Males

12250

M18-39

12250

25.2M→Finish

25.2 - 26.2 mi

Top 36%
×2stories
+22ft-21ft

Overall

10110

Males

7047

M18-39

7047

Passing Analysis

Category:
Athletes Passed
864
Passed By
7600
Net Change
-6738
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#8559
5K → 10K81865-1859#8559#10418
10K → 15K39981-942#10418#11360
15K → 20K381125-1087#11360#12447
20K → Half2433-9#12447#12456
Half → 25K381130-1092#12456#13548
25K → 30K481419-1371#13548#14919
30K → 20M48440-392#14919#15311
20M → 21M111122-11#15311#15322
21M → 35K8742+45#15322#15277
35K → 23M95142-47#15277#15324
23M → 24M8843+45#15324#15279
24M → 40K43144-101#15279#15380
40K → 25.2M7110-103#15380#15483
25.2M → Finish1904+186#15483#15297
TOTALS8647600-6738
📊

Passing Visuals

Category:
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🔥Passing Intensity

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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