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BOSTON MARATHON 2025

Feng-Yi Tsai

Bib: 9056•M

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Male)
#0 / 16105
Masters (Masters Men)
#0 / 10463
Division (M40-44)
#0 / 2247
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
28:09
Rank: #22689
Start → 5K
28:09 | 9:04/mi
10K· 6.21 mi
58:50
Rank: #24093 (-1404)
5K → 10K
30:41 | 9:53/mi
15K· 9.32 mi
1:30:26
Rank: #24585 (-492)
10K → 15K
31:36 | 10:10/mi
20K· 12.43 mi
2:03:15
Rank: #24802 (-217)
15K → 20K
32:49 | 10:34/mi
Half· 13.11 mi
2:10:00
Rank: #24796 (+6)
20K → Half
6:45 | 9:54/mi
25K· 15.53 mi
2:36:20
Rank: #24854 (-58)
Half → 25K
26:20 | 10:52/mi
30K· 18.64 mi
3:11:55
Rank: #24858 (-4)
25K → 30K
35:35 | 11:27/mi
20M
3:27:36
Rank: #24851 (+7)
30K → 20M
15:41 | 11:32/mi
21M
3:41:45
Rank: #24986 (-135)
20M → 21M
14:09 | 14:09/mi
35K· 21.75 mi
3:50:10
Rank: #24989 (-3)
21M → 35K
8:25 | 11:15/mi
23M
4:04:28
Rank: #24937 (+52)
35K → 23M
14:18 | 11:25/mi
24M
4:16:25
Rank: #24978 (-41)
23M → 24M
11:57 | 11:57/mi
40K· 24.85 mi
4:25:48
Rank: #24917 (+61)
24M → 40K
9:23 | 10:58/mi
25.2M
4:30:06
Rank: #24912 (+5)
40K → 25.2M
4:18 | 12:28/mi
Finish· 26.22 mi
4:40:45
Rank: #24897 (+15)
25.2M → Finish
10:39 | 10:27/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:10:00
Pace9:55 /mi
2nd Half
Distance13.11 mi
Time2:30:45
Pace11:30 /mi
📊Positive Split: 16.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:53:4728:099:0428:09
9:04
-
10K
6.21 mi11:24:2858:509:2830:41
9:53
+0:49
15K
9.32 mi11:56:041:30:269:4231:36
10:10
+0:17
20K
12.43 mi12:28:532:03:159:5532:49
10:34
+0:24
Half
13.11 mi12:35:382:10:009:556:45
9:54
-0:40
25K
15.53 mi13:01:582:36:2010:0426:20
10:52
+0:58
30K
18.64 mi13:37:333:11:5510:1835:35
11:27
+0:35
20M
20.00 mi13:53:143:27:3610:2315:41
11:32
+0:05
21M
21.00 mi14:07:233:41:4510:3414:09
14:09
+2:37
35K
21.75 mi14:15:483:50:1010:358:25
11:15
-2:54
23M
23.00 mi14:30:064:04:2810:3814:18
11:25
+0:10
24M
24.00 mi14:42:034:16:2510:4111:57
11:57
+0:32
40K
24.85 mi14:51:264:25:4810:429:23
10:58
-0:59
25.2M
25.20 mi14:55:444:30:0610:434:18
12:28
+1:30
Finish
26.22 mi15:06:234:40:4510:4310:39
10:27
-2:01

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

9:04 /mi

Average Pace

10:43 /mi

Slowest Pace

14:09 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:37:11

35% of race

Time at Steady Pace

2:33:10

55% of race

Time at Slower Pace

30:24

11% of race

Average Pace: 10:42 /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 mi10:53:4728:099:0428:09
9:04
#22689
10K
6.21 mi11:24:2858:509:2830:41
9:53
#24093
15K
9.32 mi11:56:041:30:269:4231:36
10:10
#24585
20K
12.43 mi12:28:532:03:159:5532:49
10:34
#24802
Half
13.11 mi12:35:382:10:009:556:45
9:54
#24796
25K
15.53 mi13:01:582:36:2010:0426:20
10:52
#24854
30K
18.64 mi13:37:333:11:5510:1835:35
11:27
#24858
20M
20.00 mi13:53:143:27:3610:2315:41
11:32
#24851
21M
21.00 mi14:07:233:41:4510:3414:09
14:09
#24986
35K
21.75 mi14:15:483:50:1010:358:25
11:15
#24989
23M
23.00 mi14:30:064:04:2810:3814:18
11:25
#24937
24M
24.00 mi14:42:034:16:2510:4111:57
11:57
#24978
40K
24.85 mi14:51:264:25:4810:429:23
10:58
#24917
25.2M
25.20 mi14:55:444:30:0610:434:18
12:28
#24912
Finish
26.22 mi15:06:234:40:4510:4310:39
10:27
#24897
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi22689136271362725356(Top 89%)14861(Top 92%)14861(Top 661%)
10K6.21 mi3.10 mi24093-140414297-67014297-67025037(Top 88%)14720(Top 91%)14720(Top 655%)
15K9.32 mi3.11 mi24585-49214517-22014517-22025356(Top 89%)14861(Top 92%)14861(Top 661%)
20K12.43 mi3.11 mi24802-21714614-9714614-9725297(Top 89%)14807(Top 92%)14807(Top 659%)
Half13.11 mi0.68 mi24796+614613+114613+124597(Top 87%)14485(Top 90%)14485(Top 645%)
25K15.53 mi2.42 mi24854-58146131461324991(Top 88%)14647(Top 91%)14647(Top 652%)
30K18.64 mi3.11 mi24858-414598+1514598+1524781(Top 87%)14434(Top 90%)14434(Top 642%)
20M20.00 mi1.36 mi24851+714574+2414574+2424613(Top 87%)14275(Top 89%)14275(Top 635%)
21M21.00 mi1.00 mi24986-13514623-4914623-4926378(Top 93%)15059(Top 94%)15059(Top 670%)
35K21.75 mi0.75 mi24989-314619+414619+424695(Top 87%)14212(Top 88%)14212(Top 632%)
23M23.00 mi1.25 mi24937+5214574+4514574+4524110(Top 85%)13894(Top 86%)13894(Top 618%)
24M24.00 mi1.00 mi24978-4114586-1214586-1225612(Top 90%)14604(Top 91%)14604(Top 650%)
40K24.85 mi0.85 mi24917+6114543+4314543+4323086(Top 81%)13286(Top 82%)13286(Top 591%)
25.2M25.20 mi0.35 mi24912+514537+614537+624136(Top 85%)13839(Top 86%)13839(Top 616%)
Finish26.22 mi1.02 mi24897+1514524+1314524+1324177(Top 85%)13861(Top 86%)13861(Top 617%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 89%
×21stories
+97ft-345ft

Overall

25356

Males

14861

M40-44

14861

5K→10K

3.1 - 6.2 mi

Top 88%
×5stories
+79ft-138ft

Overall

25037

Males

14720

M40-44

14720

10K→15K

6.2 - 9.3 mi

Top 89%
×3stories
+67ft-78ft

Overall

25356

Males

14861

M40-44

14861

15K→20K

9.3 - 12.4 mi

Top 89%
×5stories
+106ft-86ft

Overall

25297

Males

14807

M40-44

14807

20K→Half

12.4 - 13.1 mi

Top 87%
×2stories
+19ft-37ft

Overall

24597

Males

14485

M40-44

14485

Half→25K

13.1 - 15.5 mi

Top 88%
×4stories
+66ft-88ft

Overall

24991

Males

14647

M40-44

14647

25K→30K

15.5 - 18.6 mi

Top 87%
×9stories
+181ft-148ft

Overall

24781

Males

14434

M40-44

14434

30K→20M

18.6 - 20.0 mi

Top 87%
×5stories
+64ft-50ft

Overall

24613

Males

14275

M40-44

14275

20M→21M

20.0 - 21.0 mi

Top 93%
×8stories
+106ft-24ft

Overall

26378

Males

15059

M40-44

15059

21M→35K

21.0 - 21.8 mi

Top 87%
×7stories
+17ft-86ft

Overall

24695

Males

14212

M40-44

14212

35K→23M

21.8 - 23.0 mi

Top 85%
×5stories
+23ft-63ft

Overall

24110

Males

13894

M40-44

13894

23M→24M

23.0 - 24.0 mi

Top 90%
×6stories
+12ft-82ft

Overall

25612

Males

14604

M40-44

14604

24M→40K

24.0 - 24.9 mi

Top 81%
×1story
+6ft-20ft

Overall

23086

Males

13286

M40-44

13286

40K→25.2M

24.9 - 25.2 mi

Top 85%
×1story
+13ft-16ft

Overall

24136

Males

13839

M40-44

13839

25.2M→Finish

25.2 - 26.2 mi

Top 85%
×2stories
+22ft-21ft

Overall

24177

Males

13861

M40-44

13861

Passing Analysis

Category:
Athletes Passed
668
Passed By
2876
Net Change
-2208
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#22689
5K → 10K191423-1404#22689#24093
10K → 15K35527-492#24093#24585
15K → 20K70287-217#24585#24802
20K → Half2216+6#24802#24796
Half → 25K83141-58#24796#24854
25K → 30K130134-4#24854#24858
30K → 20M5952+7#24858#24851
20M → 21M15150-135#24851#24986
21M → 35K2326-3#24986#24989
35K → 23M7321+52#24989#24937
23M → 24M1960-41#24937#24978
24M → 40K676+61#24978#24917
40K → 25.2M1611+5#24917#24912
25.2M → Finish3722+15#24912#24897
TOTALS6682876-2208
📊

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