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BOSTON MARATHON 2025

Alexander Kasas

Bib: 4889•M

CA

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
26:17
Rank: #19640
Start → 5K
26:17 | 8:28/mi
10K· 6.21 mi
52:26
Rank: #19468 (+172)
5K → 10K
26:09 | 8:25/mi
15K· 9.32 mi
1:19:04
Rank: #19552 (-84)
10K → 15K
26:38 | 8:34/mi
20K· 12.43 mi
1:45:33
Rank: #19219 (+333)
15K → 20K
26:29 | 8:31/mi
Half· 13.11 mi
1:51:16
Rank: #19180 (+39)
20K → Half
5:43 | 8:23/mi
25K· 15.53 mi
2:11:53
Rank: #18846 (+334)
Half → 25K
20:37 | 8:30/mi
30K· 18.64 mi
2:38:55
Rank: #18292 (+554)
25K → 30K
27:02 | 8:42/mi
20M
2:50:16
Rank: #17860 (+432)
30K → 20M
11:21 | 8:21/mi
21M
2:58:48
Rank: #17456 (+404)
20M → 21M
8:32 | 8:32/mi
35K· 21.75 mi
3:04:41
Rank: #17217 (+239)
21M → 35K
5:53 | 7:52/mi
23M
3:14:39
Rank: #16768 (+449)
35K → 23M
9:58 | 7:58/mi
24M
3:22:19
Rank: #16412 (+356)
23M → 24M
7:40 | 7:40/mi
40K· 24.85 mi
3:28:46
Rank: #16076 (+336)
24M → 40K
6:27 | 7:33/mi
25.2M
3:31:27
Rank: #15877 (+199)
40K → 25.2M
2:41 | 7:47/mi
Finish· 26.22 mi
3:38:18
Rank: #15439 (+438)
25.2M → Finish
6:51 | 6:43/mi

The Course

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Half Splits

1st Half· via Half
Distance13.11 mi
Time1:51:16
Pace8:29 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:47:02
Pace8:10 /mi
📊Negative Split: 3.8% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:31:2926:178:2826:17
8:28
-
10K
6.21 mi10:57:3852:268:2626:09
8:25
-0:03
15K
9.32 mi11:24:161:19:048:2926:38
8:34
+0:09
20K
12.43 mi11:50:451:45:338:3026:29
8:31
-0:03
Half
13.11 mi11:56:281:51:168:295:43
8:23
-0:08
25K
15.53 mi12:17:052:11:538:2920:37
8:30
+0:07
30K
18.64 mi12:44:072:38:558:3227:02
8:42
+0:12
20M
20.00 mi12:55:282:50:168:3111:21
8:21
-0:21
21M
21.00 mi13:04:002:58:488:318:32
8:32
+0:11
35K
21.75 mi13:09:533:04:418:305:53
7:52
-0:40
23M
23.00 mi13:19:513:14:398:289:58
7:58
+0:06
24M
24.00 mi13:27:313:22:198:267:40
7:40
-0:18
40K
24.85 mi13:33:583:28:468:246:27
7:33
-0:07
25.2M
25.20 mi13:36:393:31:278:232:41
7:47
+0:14
Finish
26.22 mi13:43:303:38:188:206:51
6:43
-1:04

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

6:43 /mi

Average Pace

8:20 /mi

Slowest Pace

8:42 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

39:30

18% of race

Time at Steady Pace

2:31:46

70% of race

Time at Slower Pace

27:02

12% of race

Average Pace: 8:20 /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 mi10:31:2926:178:2826:17
8:28
#19640
10K
6.21 mi10:57:3852:268:2626:09
8:25
#19468
15K
9.32 mi11:24:161:19:048:2926:38
8:34
#19552
20K
12.43 mi11:50:451:45:338:3026:29
8:31
#19219
Half
13.11 mi11:56:281:51:168:295:43
8:23
#19180
25K
15.53 mi12:17:052:11:538:2920:37
8:30
#18846
30K
18.64 mi12:44:072:38:558:3227:02
8:42
#18292
20M
20.00 mi12:55:282:50:168:3111:21
8:21
#17860
21M
21.00 mi13:04:002:58:488:318:32
8:32
#17456
35K
21.75 mi13:09:533:04:418:305:53
7:52
#17217
23M
23.00 mi13:19:513:14:398:289:58
7:58
#16768
24M
24.00 mi13:27:313:22:198:267:40
7:40
#16412
40K
24.85 mi13:33:583:28:468:246:27
7:33
#16076
25.2M
25.20 mi13:36:393:31:278:232:41
7:47
#15877
Finish
26.22 mi13:43:303:38:188:206:51
6:43
#15439
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi19640122971229719753(Top 70%)12394(Top 77%)12394(Top 220%)
10K6.21 mi3.10 mi19468+17212246+5112246+5119285(Top 68%)12180(Top 76%)12180(Top 216%)
15K9.32 mi3.11 mi19552-8412288-4212288-4219753(Top 70%)12394(Top 77%)12394(Top 220%)
20K12.43 mi3.11 mi19219+33312129+15912129+15918388(Top 65%)11775(Top 73%)11775(Top 209%)
Half13.11 mi0.68 mi19180+3912113+1612113+1618410(Top 65%)11772(Top 73%)11772(Top 209%)
25K15.53 mi2.42 mi18846+33411967+14611967+14617208(Top 61%)11180(Top 69%)11180(Top 198%)
30K18.64 mi3.11 mi18292+55411683+28411683+28416000(Top 56%)10495(Top 65%)10495(Top 186%)
20M20.00 mi1.36 mi17860+43211462+22111462+22112843(Top 45%)8938(Top 55%)8938(Top 158%)
21M21.00 mi1.00 mi17456+40411260+20211260+20210689(Top 38%)7721(Top 48%)7721(Top 137%)
35K21.75 mi0.75 mi17217+23911137+12311137+12311286(Top 40%)8013(Top 50%)8013(Top 142%)
23M23.00 mi1.25 mi16768+44910930+20710930+2079746(Top 34%)7114(Top 44%)7114(Top 126%)
24M24.00 mi1.00 mi16412+35610751+17910751+1798903(Top 31%)6610(Top 41%)6610(Top 117%)
40K24.85 mi0.85 mi16076+33610582+16910582+1697059(Top 25%)5477(Top 34%)5477(Top 97%)
25.2M25.20 mi0.35 mi15877+19910485+9710485+974821(Top 17%)4019(Top 25%)4019(Top 71%)
Finish26.22 mi1.02 mi15439+43810271+21410271+2144035(Top 14%)3468(Top 22%)3468(Top 61%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 70%
×21stories
+97ft-345ft

Overall

19753

Males

12394

M18-39

12394

5K→10K

3.1 - 6.2 mi

Top 68%
×5stories
+79ft-138ft

Overall

19285

Males

12180

M18-39

12180

10K→15K

6.2 - 9.3 mi

Top 70%
×3stories
+67ft-78ft

Overall

19753

Males

12394

M18-39

12394

15K→20K

9.3 - 12.4 mi

Top 65%
×5stories
+106ft-86ft

Overall

18388

Males

11775

M18-39

11775

20K→Half

12.4 - 13.1 mi

Top 65%
×2stories
+19ft-37ft

Overall

18410

Males

11772

M18-39

11772

Half→25K

13.1 - 15.5 mi

Top 61%
×4stories
+66ft-88ft

Overall

17208

Males

11180

M18-39

11180

25K→30K

15.5 - 18.6 mi

Top 56%
×9stories
+181ft-148ft

Overall

16000

Males

10495

M18-39

10495

30K→20M

18.6 - 20.0 mi

Top 45%
×5stories
+64ft-50ft

Overall

12843

Males

8938

M18-39

8938

20M→21M

20.0 - 21.0 mi

Top 38%
×8stories
+106ft-24ft

Overall

10689

Males

7721

M18-39

7721

21M→35K

21.0 - 21.8 mi

Top 40%
×7stories
+17ft-86ft

Overall

11286

Males

8013

M18-39

8013

35K→23M

21.8 - 23.0 mi

Top 34%
×5stories
+23ft-63ft

Overall

9746

Males

7114

M18-39

7114

23M→24M

23.0 - 24.0 mi

Top 31%
×6stories
+12ft-82ft

Overall

8903

Males

6610

M18-39

6610

24M→40K

24.0 - 24.9 mi

Top 25%
×1story
+6ft-20ft

Overall

7059

Males

5477

M18-39

5477

40K→25.2M

24.9 - 25.2 mi

Top 17%
×1story
+13ft-16ft

Overall

4821

Males

4019

M18-39

4019

25.2M→Finish

25.2 - 26.2 mi

Top 14%
×2stories
+22ft-21ft

Overall

4035

Males

3468

M18-39

3468

Passing Analysis

Category:
Athletes Passed
4743
Passed By
542
Net Change
+4201
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#19640
5K → 10K349177+172#19640#19468
10K → 15K168252-84#19468#19552
15K → 20K37946+333#19552#19219
20K → Half6324+39#19219#19180
Half → 25K34915+334#19180#18846
25K → 30K57824+554#18846#18292
30K → 20M4331+432#18292#17860
20M → 21M4051+404#17860#17456
21M → 35K2401+239#17456#17217
35K → 23M4490+449#17217#16768
23M → 24M3571+356#16768#16412
24M → 40K3360+336#16412#16076
40K → 25.2M1990+199#16076#15877
25.2M → Finish4380+438#15877#15439
TOTALS4743542+4201
📊

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