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BOSTON MARATHON 2025

Brendan Cassidy

Bib: 31491•M

MA

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
34:37
Rank: #27709
Start → 5K
34:37 | 11:09/mi
10K· 6.21 mi
1:08:51
Rank: #27422 (+287)
5K → 10K
34:14 | 11:01/mi
15K· 9.32 mi
1:43:23
Rank: #27189 (+233)
10K → 15K
34:32 | 11:07/mi
20K· 12.43 mi
2:17:11
Rank: #26829 (+360)
15K → 20K
33:48 | 10:53/mi
Half· 13.11 mi
2:24:30
Rank: #26796 (+33)
20K → Half
7:19 | 10:43/mi
25K· 15.53 mi
2:52:22
Rank: #26643 (+153)
Half → 25K
27:52 | 11:30/mi
30K· 18.64 mi
3:28:59
Rank: #26399 (+244)
25K → 30K
36:37 | 11:47/mi
20M
3:44:40
Rank: #26269 (+130)
30K → 20M
15:41 | 11:32/mi
21M
3:56:58
Rank: #26170 (+99)
20M → 21M
12:18 | 12:18/mi
35K· 21.75 mi
4:05:11
Rank: #26097 (+73)
21M → 35K
8:13 | 10:59/mi
23M
4:19:01
Rank: #25987 (+110)
35K → 23M
13:50 | 11:03/mi
24M
4:29:57
Rank: #25925 (+62)
23M → 24M
10:56 | 10:56/mi
40K· 24.85 mi
4:39:31
Rank: #25868 (+57)
24M → 40K
9:34 | 11:11/mi
25.2M
4:43:31
Rank: #25836 (+32)
40K → 25.2M
4:00 | 11:36/mi
Finish· 26.22 mi
4:53:39
Rank: #25776 (+60)
25.2M → Finish
10:08 | 9:57/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:24:30
Pace11:01 /mi
2nd Half
Distance13.11 mi
Time2:29:09
Pace11:23 /mi
📊Positive Split: 3.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:58:0334:3711:0934:37
11:09
-
10K
6.21 mi12:32:171:08:5111:0534:14
11:01
-0:08
15K
9.32 mi13:06:491:43:2311:0634:32
11:07
+0:06
20K
12.43 mi13:40:372:17:1111:0233:48
10:53
-0:14
Half
13.11 mi13:47:562:24:3011:017:19
10:43
-0:10
25K
15.53 mi14:15:482:52:2211:0627:52
11:30
+0:47
30K
18.64 mi14:52:253:28:5911:1336:37
11:47
+0:17
20M
20.00 mi15:08:063:44:4011:1415:41
11:32
-0:15
21M
21.00 mi15:20:243:56:5811:1712:18
12:18
+0:46
35K
21.75 mi15:28:374:05:1111:168:13
10:59
-1:19
23M
23.00 mi15:42:274:19:0111:1613:50
11:03
+0:04
24M
24.00 mi15:53:234:29:5711:1510:56
10:56
-0:07
40K
24.85 mi16:02:574:39:3111:159:34
11:11
+0:15
25.2M
25.20 mi16:06:574:43:3111:154:00
11:36
+0:25
Finish
26.22 mi16:17:054:53:3911:1210:08
9:57
-1:39

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

9:57 /mi

Average Pace

11:12 /mi

Slowest Pace

12:18 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

17:27

6% of race

Time at Steady Pace

2:59:44

61% of race

Time at Slower Pace

1:36:28

33% of race

Average Pace: 11:12 /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 mi11:58:0334:3711:0934:37
11:09
#27709
10K
6.21 mi12:32:171:08:5111:0534:14
11:01
#27422
15K
9.32 mi13:06:491:43:2311:0634:32
11:07
#27189
20K
12.43 mi13:40:372:17:1111:0233:48
10:53
#26829
Half
13.11 mi13:47:562:24:3011:017:19
10:43
#26796
25K
15.53 mi14:15:482:52:2211:0627:52
11:30
#26643
30K
18.64 mi14:52:253:28:5911:1336:37
11:47
#26399
20M
20.00 mi15:08:063:44:4011:1415:41
11:32
#26269
21M
21.00 mi15:20:243:56:5811:1712:18
12:18
#26170
35K
21.75 mi15:28:374:05:1111:168:13
10:59
#26097
23M
23.00 mi15:42:274:19:0111:1613:50
11:03
#25987
24M
24.00 mi15:53:234:29:5711:1510:56
10:56
#25925
40K
24.85 mi16:02:574:39:3111:159:34
11:11
#25868
25.2M
25.20 mi16:06:574:43:3111:154:00
11:36
#25836
Finish
26.22 mi16:17:054:53:3911:1210:08
9:57
#25776
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi27709158661586626821(Top 94%)15487(Top 96%)15487(Top 274%)
10K6.21 mi3.10 mi27422+28715752+11415752+11427079(Top 95%)15600(Top 97%)15600(Top 276%)
15K9.32 mi3.11 mi27189+23315660+9215660+9226821(Top 94%)15487(Top 96%)15487(Top 274%)
20K12.43 mi3.11 mi26829+36015501+15915501+15925823(Top 91%)15044(Top 93%)15044(Top 267%)
Half13.11 mi0.68 mi26796+3315487+1415487+1426128(Top 92%)15158(Top 94%)15158(Top 269%)
25K15.53 mi2.42 mi26643+15315409+7815409+7825848(Top 91%)15005(Top 93%)15005(Top 266%)
30K18.64 mi3.11 mi26399+24415289+12015289+12025289(Top 89%)14673(Top 91%)14673(Top 260%)
20M20.00 mi1.36 mi26269+13015217+7215217+7224622(Top 87%)14284(Top 89%)14284(Top 253%)
21M21.00 mi1.00 mi26170+9915158+5915158+5924093(Top 85%)13956(Top 87%)13956(Top 247%)
35K21.75 mi0.75 mi26097+7315120+3815120+3824161(Top 85%)13955(Top 87%)13955(Top 247%)
23M23.00 mi1.25 mi25987+11015066+5415066+5423350(Top 82%)13508(Top 84%)13508(Top 239%)
24M24.00 mi1.00 mi25925+6215029+3715029+3723855(Top 84%)13754(Top 85%)13754(Top 244%)
40K24.85 mi0.85 mi25868+5714990+3914990+3923543(Top 83%)13527(Top 84%)13527(Top 240%)
25.2M25.20 mi0.35 mi25836+3214966+2414966+2422308(Top 79%)12958(Top 80%)12958(Top 230%)
Finish26.22 mi1.02 mi25776+6014927+3914927+3922763(Top 80%)13158(Top 82%)13158(Top 233%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 94%
×21stories
+97ft-345ft

Overall

26821

Males

15487

M18-39

15487

5K→10K

3.1 - 6.2 mi

Top 95%
×5stories
+79ft-138ft

Overall

27079

Males

15600

M18-39

15600

10K→15K

6.2 - 9.3 mi

Top 94%
×3stories
+67ft-78ft

Overall

26821

Males

15487

M18-39

15487

15K→20K

9.3 - 12.4 mi

Top 91%
×5stories
+106ft-86ft

Overall

25823

Males

15044

M18-39

15044

20K→Half

12.4 - 13.1 mi

Top 92%
×2stories
+19ft-37ft

Overall

26128

Males

15158

M18-39

15158

Half→25K

13.1 - 15.5 mi

Top 91%
×4stories
+66ft-88ft

Overall

25848

Males

15005

M18-39

15005

25K→30K

15.5 - 18.6 mi

Top 89%
×9stories
+181ft-148ft

Overall

25289

Males

14673

M18-39

14673

30K→20M

18.6 - 20.0 mi

Top 87%
×5stories
+64ft-50ft

Overall

24622

Males

14284

M18-39

14284

20M→21M

20.0 - 21.0 mi

Top 85%
×8stories
+106ft-24ft

Overall

24093

Males

13956

M18-39

13956

21M→35K

21.0 - 21.8 mi

Top 85%
×7stories
+17ft-86ft

Overall

24161

Males

13955

M18-39

13955

35K→23M

21.8 - 23.0 mi

Top 82%
×5stories
+23ft-63ft

Overall

23350

Males

13508

M18-39

13508

23M→24M

23.0 - 24.0 mi

Top 84%
×6stories
+12ft-82ft

Overall

23855

Males

13754

M18-39

13754

24M→40K

24.0 - 24.9 mi

Top 83%
×1story
+6ft-20ft

Overall

23543

Males

13527

M18-39

13527

40K→25.2M

24.9 - 25.2 mi

Top 79%
×1story
+13ft-16ft

Overall

22308

Males

12958

M18-39

12958

25.2M→Finish

25.2 - 26.2 mi

Top 80%
×2stories
+22ft-21ft

Overall

22763

Males

13158

M18-39

13158

Passing Analysis

Category:
Athletes Passed
2029
Passed By
96
Net Change
+1933
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#27709
5K → 10K30013+287#27709#27422
10K → 15K24815+233#27422#27189
15K → 20K3644+360#27189#26829
20K → Half341+33#26829#26796
Half → 25K17118+153#26796#26643
25K → 30K25511+244#26643#26399
30K → 20M1344+130#26399#26269
20M → 21M1067+99#26269#26170
21M → 35K785+73#26170#26097
35K → 23M1144+110#26097#25987
23M → 24M675+62#25987#25925
24M → 40K614+57#25925#25868
40K → 25.2M342+32#25868#25836
25.2M → Finish633+60#25836#25776
TOTALS202996+1933
📊

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