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BOSTON MARATHON 2025

Grzegorz Kasiorek

Bib: 1919•M

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 12%
Gender (Male)
#0 / 16105
Top 20%
Division (M18-39)
#0 / 5642
Top 43%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
18:45
Rank: #1189
Start → 5K
18:45 | 6:02/mi
10K· 6.21 mi
37:32
Rank: #1199 (-10)
5K → 10K
18:47 | 6:03/mi
15K· 9.32 mi
56:16
Rank: #1164 (+35)
10K → 15K
18:44 | 6:02/mi
20K· 12.43 mi
1:15:19
Rank: #1175 (-11)
15K → 20K
19:03 | 6:08/mi
Half· 13.11 mi
1:19:29
Rank: #1185 (-10)
20K → Half
4:10 | 6:06/mi
25K· 15.53 mi
1:34:30
Rank: #1220 (-35)
Half → 25K
15:01 | 6:12/mi
30K· 18.64 mi
1:55:08
Rank: #1392 (-172)
25K → 30K
20:38 | 6:38/mi
20M
2:05:03
Rank: #1613 (-221)
30K → 20M
9:55 | 7:18/mi
21M
2:13:28
Rank: #1940 (-327)
20M → 21M
8:25 | 8:25/mi
35K· 21.75 mi
2:19:04
Rank: #2107 (-167)
21M → 35K
5:36 | 7:29/mi
23M
2:29:13
Rank: #2460 (-353)
35K → 23M
10:09 | 8:06/mi
24M
2:37:25
Rank: #2768 (-308)
23M → 24M
8:12 | 8:12/mi
40K· 24.85 mi
2:44:42
Rank: #3053 (-285)
24M → 40K
7:17 | 8:31/mi
25.2M
2:47:51
Rank: #3176 (-123)
40K → 25.2M
3:09 | 9:08/mi
Finish· 26.22 mi
2:55:37
Rank: #3387 (-211)
25.2M → Finish
7:46 | 7:37/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:19:29
Pace6:04 /mi
2nd Half
Distance13.11 mi
Time1:36:08
Pace7:20 /mi
📊Positive Split: 20.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:19:1418:456:0218:45
6:02
-
10K
6.21 mi10:38:0137:326:0218:47
6:03
+0:01
15K
9.32 mi10:56:4556:166:0218:44
6:02
-0:01
20K
12.43 mi11:15:481:15:196:0419:03
6:08
+0:06
Half
13.11 mi11:19:581:19:296:044:10
6:06
-0:02
25K
15.53 mi11:34:591:34:306:0515:01
6:12
+0:06
30K
18.64 mi11:55:371:55:086:1120:38
6:38
+0:26
20M
20.00 mi12:05:322:05:036:159:55
7:18
+0:40
21M
21.00 mi12:13:572:13:286:218:25
8:25
+1:07
35K
21.75 mi12:19:332:19:046:245:36
7:29
-0:56
23M
23.00 mi12:29:422:29:136:2910:09
8:06
+0:37
24M
24.00 mi12:37:542:37:256:348:12
8:12
+0:06
40K
24.85 mi12:45:112:44:426:387:17
8:31
+0:19
25.2M
25.20 mi12:48:202:47:516:403:09
9:08
+0:37
Finish
26.22 mi12:56:062:55:376:427:46
7:37
-1:31

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

6:02 /mi

Average Pace

6:42 /mi

Slowest Pace

9:08 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:55:08

66% of race

Time at Steady Pace

23:17

13% of race

Time at Slower Pace

37:12

21% of race

Average Pace: 6:42 /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 mi10:19:1418:456:0218:45
6:02
#1189
10K
6.21 mi10:38:0137:326:0218:47
6:03
#1199
15K
9.32 mi10:56:4556:166:0218:44
6:02
#1164
20K
12.43 mi11:15:481:15:196:0419:03
6:08
#1175
Half
13.11 mi11:19:581:19:296:044:10
6:06
#1185
25K
15.53 mi11:34:591:34:306:0515:01
6:12
#1220
30K
18.64 mi11:55:371:55:086:1120:38
6:38
#1392
20M
20.00 mi12:05:322:05:036:159:55
7:18
#1613
21M
21.00 mi12:13:572:13:286:218:25
8:25
#1940
35K
21.75 mi12:19:332:19:046:245:36
7:29
#2107
23M
23.00 mi12:29:422:29:136:2910:09
8:06
#2460
24M
24.00 mi12:37:542:37:256:348:12
8:12
#2768
40K
24.85 mi12:45:112:44:426:387:17
8:31
#3053
25.2M
25.20 mi12:48:202:47:516:403:09
9:08
#3176
Finish
26.22 mi12:56:062:55:376:427:46
7:37
#3387
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi1189112511251134(Top 4%)1073(Top 7%)1073(Top 19%)
10K6.21 mi3.10 mi1199-101136-111136-111270(Top 4%)1205(Top 7%)1205(Top 21%)
15K9.32 mi3.11 mi1164+351102+341102+341134(Top 4%)1073(Top 7%)1073(Top 19%)
20K12.43 mi3.11 mi1175-111114-121114-121291(Top 5%)1225(Top 8%)1225(Top 22%)
Half13.11 mi0.68 mi1185-101123-91123-91599(Top 6%)1522(Top 9%)1522(Top 27%)
25K15.53 mi2.42 mi1220-351154-311154-311435(Top 5%)1363(Top 8%)1363(Top 24%)
30K18.64 mi3.11 mi1392-1721316-1621316-1622616(Top 9%)2477(Top 15%)2477(Top 44%)
20M20.00 mi1.36 mi1613-2211528-2121528-2125772(Top 20%)5033(Top 31%)5033(Top 89%)
21M21.00 mi1.00 mi1940-3271844-3161844-3169910(Top 35%)7300(Top 45%)7300(Top 129%)
35K21.75 mi0.75 mi2107-1672006-1622006-1628464(Top 30%)6556(Top 41%)6556(Top 116%)
23M23.00 mi1.25 mi2460-3532342-3362342-33610758(Top 38%)7610(Top 47%)7610(Top 135%)
24M24.00 mi1.00 mi2768-3082625-2832625-28312521(Top 44%)8416(Top 52%)8416(Top 149%)
40K24.85 mi0.85 mi3053-2852881-2562881-25613499(Top 48%)8743(Top 54%)8743(Top 155%)
25.2M25.20 mi0.35 mi3176-1232990-1092990-10912455(Top 44%)8184(Top 51%)8184(Top 145%)
Finish26.22 mi1.02 mi3387-2113171-1813171-18110067(Top 35%)7004(Top 43%)7004(Top 124%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 4%
×21stories
+97ft-345ft

Overall

1134

Males

1073

M18-39

1073

5K→10K

3.1 - 6.2 mi

Top 4%
×5stories
+79ft-138ft

Overall

1270

Males

1205

M18-39

1205

10K→15K

6.2 - 9.3 mi

Top 4%
×3stories
+67ft-78ft

Overall

1134

Males

1073

M18-39

1073

15K→20K

9.3 - 12.4 mi

Top 5%
×5stories
+106ft-86ft

Overall

1291

Males

1225

M18-39

1225

20K→Half

12.4 - 13.1 mi

Top 6%
×2stories
+19ft-37ft

Overall

1599

Males

1522

M18-39

1522

Half→25K

13.1 - 15.5 mi

Top 5%
×4stories
+66ft-88ft

Overall

1435

Males

1363

M18-39

1363

25K→30K

15.5 - 18.6 mi

Top 9%
×9stories
+181ft-148ft

Overall

2616

Males

2477

M18-39

2477

30K→20M

18.6 - 20.0 mi

Top 20%
×5stories
+64ft-50ft

Overall

5772

Males

5033

M18-39

5033

20M→21M

20.0 - 21.0 mi

Top 35%
×8stories
+106ft-24ft

Overall

9910

Males

7300

M18-39

7300

21M→35K

21.0 - 21.8 mi

Top 30%
×7stories
+17ft-86ft

Overall

8464

Males

6556

M18-39

6556

35K→23M

21.8 - 23.0 mi

Top 38%
×5stories
+23ft-63ft

Overall

10758

Males

7610

M18-39

7610

23M→24M

23.0 - 24.0 mi

Top 44%
×6stories
+12ft-82ft

Overall

12521

Males

8416

M18-39

8416

24M→40K

24.0 - 24.9 mi

Top 48%
×1story
+6ft-20ft

Overall

13499

Males

8743

M18-39

8743

40K→25.2M

24.9 - 25.2 mi

Top 44%
×1story
+13ft-16ft

Overall

12455

Males

8184

M18-39

8184

25.2M→Finish

25.2 - 26.2 mi

Top 35%
×2stories
+22ft-21ft

Overall

10067

Males

7004

M18-39

7004

Passing Analysis

Category:
Athletes Passed
253
Passed By
2451
Net Change
-2198
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#1189
5K → 10K6373-10#1189#1199
10K → 15K5318+35#1199#1164
15K → 20K3647-11#1164#1175
20K → Half515-10#1175#1185
Half → 25K2661-35#1185#1220
25K → 30K20192-172#1220#1392
30K → 20M6227-221#1392#1613
20M → 21M3330-327#1613#1940
21M → 35K10177-167#1940#2107
35K → 23M5358-353#2107#2460
23M → 24M9317-308#2460#2768
24M → 40K3288-285#2768#3053
40K → 25.2M5128-123#3053#3176
25.2M → Finish9220-211#3176#3387
TOTALS2532451-2198
📊

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