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BOSTON MARATHON 2023

Alexander Kost

Bib: 6403•M

NY

0:00
0:00
/ mi
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Overall
#0 / 26622
Top 7%
Gender (Male)
#0 / 15176
Top 12%
Division (M18-39)
#0 / 5285
Top 28%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
20:24
Rank: #2638
Start → 5K
20:24 | 6:34/mi
10K· 6.21 mi
40:28
Rank: #2582 (+56)
5K → 10K
20:04 | 6:28/mi
15K· 9.32 mi
1:00:22
Rank: #2419 (+163)
10K → 15K
19:54 | 6:24/mi
20K· 12.43 mi
1:20:39
Rank: #2389 (+30)
15K → 20K
20:17 | 6:32/mi
Half· 13.11 mi
1:24:57
Rank: #2362 (+27)
20K → Half
4:18 | 6:18/mi
25K· 15.53 mi
1:40:45
Rank: #2339 (+23)
Half → 25K
15:48 | 6:31/mi
30K· 18.64 mi
2:01:10
Rank: #2230 (+109)
25K → 30K
20:25 | 6:34/mi
20M
2:10:02
Rank: #2153 (+77)
30K → 20M
8:52 | 6:31/mi
21M
2:16:57
Rank: #2103 (+50)
20M → 21M
6:55 | 6:55/mi
35K· 21.75 mi
2:21:36
Rank: #2059 (+44)
21M → 35K
4:39 | 6:13/mi
23M
2:29:50
Rank: #2003 (+56)
35K → 23M
8:14 | 6:35/mi
24M
2:36:17
Rank: #1984 (+19)
23M → 24M
6:27 | 6:27/mi
40K· 24.85 mi
2:41:54
Rank: #1952 (+32)
24M → 40K
5:37 | 6:34/mi
25.2M
2:44:20
Rank: #1943 (+9)
40K → 25.2M
2:26 | 7:03/mi
Finish· 26.22 mi
2:50:47
Rank: #1905 (+38)
25.2M → Finish
6:27 | 6:20/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:24:57
Pace6:29 /mi
2nd Half
Distance13.11 mi
Time1:25:50
Pace6:33 /mi
📊Positive Split: 1.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:23:3020:246:3420:24
6:34
-
10K
6.21 mi10:43:3440:286:3120:04
6:28
-0:06
15K
9.32 mi11:03:281:00:226:2919:54
6:24
-0:04
20K
12.43 mi11:23:451:20:396:2920:17
6:32
+0:08
Half
13.11 mi11:28:031:24:576:294:18
6:18
-0:14
25K
15.53 mi11:43:511:40:456:2915:48
6:31
+0:13
30K
18.64 mi12:04:162:01:106:3020:25
6:34
+0:03
20M
20.00 mi12:13:082:10:026:308:52
6:31
-0:03
21M
21.00 mi12:20:032:16:576:316:55
6:55
+0:24
35K
21.75 mi12:24:422:21:366:314:39
6:13
-0:42
23M
23.00 mi12:32:562:29:506:318:14
6:35
+0:22
24M
24.00 mi12:39:232:36:176:316:27
6:27
-0:08
40K
24.85 mi12:45:002:41:546:315:37
6:34
+0:07
25.2M
25.20 mi12:47:262:44:206:312:26
7:03
+0:29
Finish
26.22 mi12:53:532:50:476:316:27
6:20
-0:43

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

6:13 /mi

Average Pace

6:31 /mi

Slowest Pace

7:03 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:41:26

95% of race

Time at Steady Pace

9:21

5% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:31 /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 mi10:23:3020:246:3420:24
6:34
#2638
10K
6.21 mi10:43:3440:286:3120:04
6:28
#2582
15K
9.32 mi11:03:281:00:226:2919:54
6:24
#2419
20K
12.43 mi11:23:451:20:396:2920:17
6:32
#2389
Half
13.11 mi11:28:031:24:576:294:18
6:18
#2362
25K
15.53 mi11:43:511:40:456:2915:48
6:31
#2339
30K
18.64 mi12:04:162:01:106:3020:25
6:34
#2230
20M
20.00 mi12:13:082:10:026:308:52
6:31
#2153
21M
21.00 mi12:20:032:16:576:316:55
6:55
#2103
35K
21.75 mi12:24:422:21:366:314:39
6:13
#2059
23M
23.00 mi12:32:562:29:506:318:14
6:35
#2003
24M
24.00 mi12:39:232:36:176:316:27
6:27
#1984
40K
24.85 mi12:45:002:41:546:315:37
6:34
#1952
25.2M
25.20 mi12:47:262:44:206:312:26
7:03
#1943
Finish
26.22 mi12:53:532:50:476:316:27
6:20
#1905
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi2638251225122128(Top 8%)2041(Top 13%)2041(Top 39%)
10K6.21 mi3.10 mi2582+562462+502462+502539(Top 10%)2426(Top 16%)2426(Top 46%)
15K9.32 mi3.11 mi2419+1632315+1472315+1472128(Top 8%)2041(Top 13%)2041(Top 39%)
20K12.43 mi3.11 mi2389+302288+272288+272439(Top 9%)2335(Top 15%)2335(Top 44%)
Half13.11 mi0.68 mi2362+272264+242264+241791(Top 7%)1720(Top 11%)1720(Top 33%)
25K15.53 mi2.42 mi2339+232244+202244+202238(Top 8%)2146(Top 14%)2146(Top 41%)
30K18.64 mi3.11 mi2230+1092140+1042140+1041841(Top 7%)1764(Top 12%)1764(Top 33%)
20M20.00 mi1.36 mi2153+772064+762064+761550(Top 6%)1478(Top 10%)1478(Top 28%)
21M21.00 mi1.00 mi2103+502015+492015+491815(Top 7%)1727(Top 11%)1727(Top 33%)
35K21.75 mi0.75 mi2059+441975+401975+401307(Top 5%)1244(Top 8%)1244(Top 24%)
23M23.00 mi1.25 mi2003+561920+551920+551692(Top 6%)1606(Top 11%)1606(Top 30%)
24M24.00 mi1.00 mi1984+191901+191901+191888(Top 7%)1774(Top 12%)1774(Top 34%)
40K24.85 mi0.85 mi1952+321868+331868+331787(Top 7%)1682(Top 11%)1682(Top 32%)
25.2M25.20 mi0.35 mi1943+91859+91859+91904(Top 7%)1787(Top 12%)1787(Top 34%)
Finish26.22 mi1.02 mi1905+381822+371822+371734(Top 7%)1630(Top 11%)1630(Top 31%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 8%
×21stories
+97ft-345ft

Overall

2128

Males

2041

M18-39

2041

5K→10K

3.1 - 6.2 mi

Top 10%
×5stories
+79ft-138ft

Overall

2539

Males

2426

M18-39

2426

10K→15K

6.2 - 9.3 mi

Top 8%
×3stories
+67ft-78ft

Overall

2128

Males

2041

M18-39

2041

15K→20K

9.3 - 12.4 mi

Top 9%
×5stories
+106ft-86ft

Overall

2439

Males

2335

M18-39

2335

20K→Half

12.4 - 13.1 mi

Top 7%
×2stories
+19ft-37ft

Overall

1791

Males

1720

M18-39

1720

Half→25K

13.1 - 15.5 mi

Top 8%
×4stories
+66ft-88ft

Overall

2238

Males

2146

M18-39

2146

25K→30K

15.5 - 18.6 mi

Top 7%
×9stories
+181ft-148ft

Overall

1841

Males

1764

M18-39

1764

30K→20M

18.6 - 20.0 mi

Top 6%
×5stories
+64ft-50ft

Overall

1550

Males

1478

M18-39

1478

20M→21M

20.0 - 21.0 mi

Top 7%
×8stories
+106ft-24ft

Overall

1815

Males

1727

M18-39

1727

21M→35K

21.0 - 21.8 mi

Top 5%
×7stories
+17ft-86ft

Overall

1307

Males

1244

M18-39

1244

35K→23M

21.8 - 23.0 mi

Top 6%
×5stories
+23ft-63ft

Overall

1692

Males

1606

M18-39

1606

23M→24M

23.0 - 24.0 mi

Top 7%
×6stories
+12ft-82ft

Overall

1888

Males

1774

M18-39

1774

24M→40K

24.0 - 24.9 mi

Top 7%
×1story
+6ft-20ft

Overall

1787

Males

1682

M18-39

1682

40K→25.2M

24.9 - 25.2 mi

Top 7%
×1story
+13ft-16ft

Overall

1904

Males

1787

M18-39

1787

25.2M→Finish

25.2 - 26.2 mi

Top 7%
×2stories
+22ft-21ft

Overall

1734

Males

1630

M18-39

1630

Passing Analysis

Category:
Athletes Passed
1055
Passed By
322
Net Change
+733
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#2638
5K → 10K177121+56#2638#2582
10K → 15K18623+163#2582#2419
15K → 20K7141+30#2419#2389
20K → Half325+27#2389#2362
Half → 25K5835+23#2362#2339
25K → 30K13223+109#2339#2230
30K → 20M803+77#2230#2153
20M → 21M599+50#2153#2103
21M → 35K440+44#2103#2059
35K → 23M7014+56#2059#2003
23M → 24M3617+19#2003#1984
24M → 40K4210+32#1984#1952
40K → 25.2M1910+9#1952#1943
25.2M → Finish4911+38#1943#1905
TOTALS1055322+733
📊

Passing Visuals

Category:

📈Position Graph

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🎨Heatmap Timeline

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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