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BOSTON MARATHON 2025

Boris Chakalov

Bib: 5926•M

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 34%
Gender (Male)
#0 / 16105
Top 47%
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
22:40
Rank: #10312
Start → 5K
22:40 | 7:18/mi
10K· 6.21 mi
45:19
Rank: #10276 (+36)
5K → 10K
22:39 | 7:17/mi
15K· 9.32 mi
1:08:19
Rank: #10468 (-192)
10K → 15K
23:00 | 7:24/mi
20K· 12.43 mi
1:31:37
Rank: #10510 (-42)
15K → 20K
23:18 | 7:30/mi
Half· 13.11 mi
1:36:38
Rank: #10485 (+25)
20K → Half
5:01 | 7:21/mi
25K· 15.53 mi
1:54:41
Rank: #10292 (+193)
Half → 25K
18:03 | 7:27/mi
30K· 18.64 mi
2:19:06
Rank: #10247 (+45)
25K → 30K
24:25 | 7:52/mi
20M
2:29:50
Rank: #10162 (+85)
30K → 20M
10:44 | 7:54/mi
21M
2:38:11
Rank: #10108 (+54)
20M → 21M
8:21 | 8:21/mi
35K· 21.75 mi
2:43:46
Rank: #9999
21M → 35K
5:35 | 7:28/mi
23M
2:53:27
Rank: #9860
35K → 23M
9:41 | 7:44/mi
24M
3:01:10
Rank: #9795 (+65)
23M → 24M
7:43 | 7:43/mi
40K· 24.85 mi
3:07:42
Rank: #9671 (+124)
24M → 40K
6:32 | 7:38/mi
25.2M
3:10:39
Rank: #9646 (+25)
40K → 25.2M
2:57 | 8:33/mi
Finish· 26.22 mi
3:18:13
Rank: #9587 (+59)
25.2M → Finish
7:34 | 7:26/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:36:38
Pace7:22 /mi
2nd Half
Distance13.11 mi
Time1:41:35
Pace7:45 /mi
📊Positive Split: 5.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:27:0922:407:1822:40
7:18
-
10K
6.21 mi10:49:4845:197:1822:39
7:17
-0:01
15K
9.32 mi11:12:481:08:197:2023:00
7:24
+0:07
20K
12.43 mi11:36:061:31:377:2223:18
7:30
+0:06
Half
13.11 mi11:41:071:36:387:225:01
7:21
-0:09
25K
15.53 mi11:59:101:54:417:2318:03
7:27
+0:06
30K
18.64 mi12:23:352:19:067:2824:25
7:52
+0:25
20M
20.00 mi12:34:192:29:507:2910:44
7:54
+0:02
21M
21.00 mi12:42:402:38:117:328:21
8:21
+0:27
35K
21.75 mi12:48:152:43:467:325:35
7:28
-0:53
23M
23.00 mi12:57:562:53:277:329:41
7:44
+0:16
24M
24.00 mi13:05:393:01:107:337:43
7:43
-0:01
40K
24.85 mi13:12:113:07:427:336:32
7:38
-0:05
25.2M
25.20 mi13:15:083:10:397:342:57
8:33
+0:55
Finish
26.22 mi13:22:423:18:137:347:34
7:26
-1:07

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

7:17 /mi

Average Pace

7:34 /mi

Slowest Pace

8:33 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:06:55

94% of race

Time at Steady Pace

11:18

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:34 /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 mi10:27:0922:407:1822:40
7:18
#10312
10K
6.21 mi10:49:4845:197:1822:39
7:17
#10276
15K
9.32 mi11:12:481:08:197:2023:00
7:24
#10468
20K
12.43 mi11:36:061:31:377:2223:18
7:30
#10510
Half
13.11 mi11:41:071:36:387:225:01
7:21
#10485
25K
15.53 mi11:59:101:54:417:2318:03
7:27
#10292
30K
18.64 mi12:23:352:19:067:2824:25
7:52
#10247
20M
20.00 mi12:34:192:29:507:2910:44
7:54
#10162
21M
21.00 mi12:42:402:38:117:328:21
8:21
#10108
35K
21.75 mi12:48:152:43:467:325:35
7:28
#9999
23M
23.00 mi12:57:562:53:277:329:41
7:44
#9860
24M
24.00 mi13:05:393:01:107:337:43
7:43
#9795
40K
24.85 mi13:12:113:07:427:336:32
7:38
#9671
25.2M
25.20 mi13:15:083:10:397:342:57
8:33
#9646
Finish
26.22 mi13:22:423:18:137:347:34
7:26
#9587
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi103128336833610888(Top 38%)8536(Top 53%)8536(Top 151%)
10K6.21 mi3.10 mi10276+368307+298307+2910258(Top 36%)8286(Top 51%)8286(Top 147%)
15K9.32 mi3.11 mi10468-1928382-758382-7510888(Top 38%)8536(Top 53%)8536(Top 151%)
20K12.43 mi3.11 mi10510-428377+58377+510748(Top 38%)8374(Top 52%)8374(Top 148%)
Half13.11 mi0.68 mi10485+258363+148363+1410410(Top 37%)8223(Top 51%)8223(Top 146%)
25K15.53 mi2.42 mi10292+1938221+1428221+1429490(Top 33%)7591(Top 47%)7591(Top 135%)
30K18.64 mi3.11 mi10247+458143+788143+7810337(Top 36%)7855(Top 49%)7855(Top 139%)
20M20.00 mi1.36 mi10162+858068+758068+759689(Top 34%)7360(Top 46%)7360(Top 130%)
21M21.00 mi1.00 mi10108+547991+777991+779507(Top 33%)7105(Top 44%)7105(Top 126%)
35K21.75 mi0.75 mi9999+1097906+857906+858358(Top 29%)6522(Top 40%)6522(Top 116%)
23M23.00 mi1.25 mi9860+1397792+1147792+1148099(Top 29%)6224(Top 39%)6224(Top 110%)
24M24.00 mi1.00 mi9795+657727+657727+659190(Top 32%)6750(Top 42%)6750(Top 120%)
40K24.85 mi0.85 mi9671+1247634+937634+937697(Top 27%)5835(Top 36%)5835(Top 103%)
25.2M25.20 mi0.35 mi9646+257600+347600+349066(Top 32%)6485(Top 40%)6485(Top 115%)
Finish26.22 mi1.02 mi9587+597522+787522+788661(Top 30%)6267(Top 39%)6267(Top 111%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 38%
×21stories
+97ft-345ft

Overall

10888

Males

8536

M18-39

8536

5K→10K

3.1 - 6.2 mi

Top 36%
×5stories
+79ft-138ft

Overall

10258

Males

8286

M18-39

8286

10K→15K

6.2 - 9.3 mi

Top 38%
×3stories
+67ft-78ft

Overall

10888

Males

8536

M18-39

8536

15K→20K

9.3 - 12.4 mi

Top 38%
×5stories
+106ft-86ft

Overall

10748

Males

8374

M18-39

8374

20K→Half

12.4 - 13.1 mi

Top 37%
×2stories
+19ft-37ft

Overall

10410

Males

8223

M18-39

8223

Half→25K

13.1 - 15.5 mi

Top 33%
×4stories
+66ft-88ft

Overall

9490

Males

7591

M18-39

7591

25K→30K

15.5 - 18.6 mi

Top 36%
×9stories
+181ft-148ft

Overall

10337

Males

7855

M18-39

7855

30K→20M

18.6 - 20.0 mi

Top 34%
×5stories
+64ft-50ft

Overall

9689

Males

7360

M18-39

7360

20M→21M

20.0 - 21.0 mi

Top 33%
×8stories
+106ft-24ft

Overall

9507

Males

7105

M18-39

7105

21M→35K

21.0 - 21.8 mi

Top 29%
×7stories
+17ft-86ft

Overall

8358

Males

6522

M18-39

6522

35K→23M

21.8 - 23.0 mi

Top 29%
×5stories
+23ft-63ft

Overall

8099

Males

6224

M18-39

6224

23M→24M

23.0 - 24.0 mi

Top 32%
×6stories
+12ft-82ft

Overall

9190

Males

6750

M18-39

6750

24M→40K

24.0 - 24.9 mi

Top 27%
×1story
+6ft-20ft

Overall

7697

Males

5835

M18-39

5835

40K→25.2M

24.9 - 25.2 mi

Top 32%
×1story
+13ft-16ft

Overall

9066

Males

6485

M18-39

6485

25.2M→Finish

25.2 - 26.2 mi

Top 30%
×2stories
+22ft-21ft

Overall

8661

Males

6267

M18-39

6267

Passing Analysis

Category:
Athletes Passed
1786
Passed By
1307
Net Change
+477
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#10312
5K → 10K268232+36#10312#10276
10K → 15K111303-192#10276#10468
15K → 20K162203-42#10468#10510
20K → Half5227+25#10510#10485
Half → 25K24754+193#10485#10292
25K → 30K256210+45#10292#10247
30K → 20M15671+85#10247#10162
20M → 21M13379+54#10162#10108
23M → 24M11146+65#9860#9795
24M → 40K13713+124#9795#9671
40K → 25.2M4924+25#9671#9646
25.2M → Finish10445+59#9646#9587
TOTALS17861307+477
📊

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