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BOSTON MARATHON 2024

Chenglung Tsai

Bib: 5348•M

0:00
0:00
/ mi
Masters
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Overall
#0 / 25550
Top 46%
Gender (Male)
#0 / 14578
Masters (Masters Men)
#0 / 9729
Top 48%
Division (M45-49)
#0 / 2218
Race Day Weather
55°/45°F
scattered clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
20:55
Rank: #5104
Start → 5K
20:55 | 6:44/mi
10K· 6.21 mi
42:01
Rank: #5087 (+17)
5K → 10K
21:06 | 6:47/mi
15K· 9.32 mi
1:03:27
Rank: #5246 (-159)
10K → 15K
21:26 | 6:54/mi
20K· 12.43 mi
1:26:20
Rank: #5844 (-598)
15K → 20K
22:53 | 7:22/mi
Half· 13.11 mi
1:31:49
Rank: #6160 (-316)
20K → Half
5:29 | 8:02/mi
25K· 15.53 mi
1:52:11
Rank: #7095 (-935)
Half → 25K
20:22 | 8:24/mi
30K· 18.64 mi
2:22:58
Rank: #9323 (-2228)
25K → 30K
30:47 | 9:54/mi
20M
2:37:04
Rank: #10159 (-836)
30K → 20M
14:06 | 10:23/mi
21M
2:48:20
Rank: #10708 (-549)
20M → 21M
11:16 | 11:16/mi
35K· 21.75 mi
2:55:11
Rank: #10829 (-121)
21M → 35K
6:51 | 9:09/mi
23M
3:07:16
Rank: #11080 (-251)
35K → 23M
12:05 | 9:39/mi
24M
3:17:22
Rank: #11398 (-318)
23M → 24M
10:06 | 10:06/mi
40K· 24.85 mi
3:25:29
Rank: #11446 (-48)
24M → 40K
8:07 | 9:30/mi
25.2M
3:29:14
Rank: #11487 (-41)
40K → 25.2M
3:45 | 10:52/mi
Finish· 26.22 mi
3:39:30
Rank: #11875 (-388)
25.2M → Finish
10:16 | 10:04/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:31:49
Pace7:00 /mi
2nd Half
Distance13.11 mi
Time2:07:41
Pace9:44 /mi
📊Positive Split: 39.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:25:1320:556:4420:55
6:44
-
10K
6.21 mi10:46:1942:016:4621:06
6:47
+0:03
15K
9.32 mi11:07:451:03:276:4821:26
6:54
+0:07
20K
12.43 mi11:30:381:26:206:5722:53
7:22
+0:28
Half
13.11 mi11:36:071:31:497:005:29
8:02
+0:40
25K
15.53 mi11:56:291:52:117:1320:22
8:24
+0:22
30K
18.64 mi12:27:162:22:587:4030:47
9:54
+1:30
20M
20.00 mi12:41:222:37:047:5114:06
10:23
+0:29
21M
21.00 mi12:52:382:48:208:0111:16
11:16
+0:53
35K
21.75 mi12:59:292:55:118:036:51
9:09
-2:07
23M
23.00 mi13:11:343:07:168:0912:05
9:39
+0:30
24M
24.00 mi13:21:403:17:228:1310:06
10:06
+0:27
40K
24.85 mi13:29:473:25:298:168:07
9:30
-0:36
25.2M
25.20 mi13:33:323:29:148:183:45
10:52
+1:22
Finish
26.22 mi13:43:483:39:308:2310:16
10:04
-0:48

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

6:44 /mi

Average Pace

8:23 /mi

Slowest Pace

11:16 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:52:11

51% of race

Time at Steady Pace

1:18:12

36% of race

Time at Slower Pace

29:07

13% of race

Average Pace: 8:22 /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 mi10:25:1320:556:4420:55
6:44
#5104
10K
6.21 mi10:46:1942:016:4621:06
6:47
#5087
15K
9.32 mi11:07:451:03:276:4821:26
6:54
#5246
20K
12.43 mi11:30:381:26:206:5722:53
7:22
#5844
Half
13.11 mi11:36:071:31:497:005:29
8:02
#6160
25K
15.53 mi11:56:291:52:117:1320:22
8:24
#7095
30K
18.64 mi12:27:162:22:587:4030:47
9:54
#9323
20M
20.00 mi12:41:222:37:047:5114:06
10:23
#10159
21M
21.00 mi12:52:382:48:208:0111:16
11:16
#10708
35K
21.75 mi12:59:292:55:118:036:51
9:09
#10829
23M
23.00 mi13:11:343:07:168:0912:05
9:39
#11080
24M
24.00 mi13:21:403:17:228:1310:06
10:06
#11398
40K
24.85 mi13:29:473:25:298:168:07
9:30
#11446
25.2M
25.20 mi13:33:323:29:148:183:45
10:52
#11487
Finish
26.22 mi13:43:483:39:308:2310:16
10:04
#11875
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi5104472747275568(Top 22%)5062(Top 35%)5062(Top 228%)
10K6.21 mi3.10 mi5087+174705+224705+225122(Top 20%)4735(Top 32%)4735(Top 213%)
15K9.32 mi3.11 mi5246-1594844-1394844-1395568(Top 22%)5062(Top 35%)5062(Top 228%)
20K12.43 mi3.11 mi5844-5985282-4385282-4387397(Top 29%)6243(Top 43%)6243(Top 281%)
Half13.11 mi0.68 mi6160-3165501-2195501-21912958(Top 51%)9057(Top 62%)9057(Top 408%)
25K15.53 mi2.42 mi7095-9356115-6146115-61412500(Top 49%)8693(Top 60%)8693(Top 392%)
30K18.64 mi3.11 mi9323-22287334-12197334-121917043(Top 67%)10471(Top 72%)10471(Top 472%)
20M20.00 mi1.36 mi10159-8367680-3467680-34617614(Top 69%)10553(Top 72%)10553(Top 476%)
21M21.00 mi1.00 mi10708-5497893-2137893-21317026(Top 67%)10117(Top 69%)10117(Top 456%)
35K21.75 mi0.75 mi10829-1217917-247917-2414030(Top 55%)8648(Top 59%)8648(Top 390%)
23M23.00 mi1.25 mi11080-2517982-657982-6514127(Top 55%)8609(Top 59%)8609(Top 388%)
24M24.00 mi1.00 mi11398-3188065-838065-8316626(Top 65%)9830(Top 67%)9830(Top 443%)
40K24.85 mi0.85 mi11446-488053+128053+1213062(Top 51%)7955(Top 55%)7955(Top 359%)
25.2M25.20 mi0.35 mi11487-418057-48057-414032(Top 55%)8417(Top 58%)8417(Top 379%)
Finish26.22 mi1.02 mi11875-3888190-1338190-13318634(Top 73%)10789(Top 74%)10789(Top 486%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 22%
×21stories
+97ft-345ft

Overall

5568

Males

5062

M45-49

5062

5K→10K

3.1 - 6.2 mi

Top 20%
×5stories
+79ft-138ft

Overall

5122

Males

4735

M45-49

4735

10K→15K

6.2 - 9.3 mi

Top 22%
×3stories
+67ft-78ft

Overall

5568

Males

5062

M45-49

5062

15K→20K

9.3 - 12.4 mi

Top 29%
×5stories
+106ft-86ft

Overall

7397

Males

6243

M45-49

6243

20K→Half

12.4 - 13.1 mi

Top 51%
×2stories
+19ft-37ft

Overall

12958

Males

9057

M45-49

9057

Half→25K

13.1 - 15.5 mi

Top 49%
×4stories
+66ft-88ft

Overall

12500

Males

8693

M45-49

8693

25K→30K

15.5 - 18.6 mi

Top 67%
×9stories
+181ft-148ft

Overall

17043

Males

10471

M45-49

10471

30K→20M

18.6 - 20.0 mi

Top 69%
×5stories
+64ft-50ft

Overall

17614

Males

10553

M45-49

10553

20M→21M

20.0 - 21.0 mi

Top 67%
×8stories
+106ft-24ft

Overall

17026

Males

10117

M45-49

10117

21M→35K

21.0 - 21.8 mi

Top 55%
×7stories
+17ft-86ft

Overall

14030

Males

8648

M45-49

8648

35K→23M

21.8 - 23.0 mi

Top 55%
×5stories
+23ft-63ft

Overall

14127

Males

8609

M45-49

8609

23M→24M

23.0 - 24.0 mi

Top 65%
×6stories
+12ft-82ft

Overall

16626

Males

9830

M45-49

9830

24M→40K

24.0 - 24.9 mi

Top 51%
×1story
+6ft-20ft

Overall

13062

Males

7955

M45-49

7955

40K→25.2M

24.9 - 25.2 mi

Top 55%
×1story
+13ft-16ft

Overall

14032

Males

8417

M45-49

8417

25.2M→Finish

25.2 - 26.2 mi

Top 73%
×2stories
+22ft-21ft

Overall

18634

Males

10789

M45-49

10789

Passing Analysis

Category:
Athletes Passed
743
Passed By
7511
Net Change
-6771
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#5104
5K → 10K185168+17#5104#5087
10K → 15K103262-159#5087#5246
15K → 20K55653-598#5246#5844
20K → Half3319-316#5844#6160
Half → 25K26961-935#6160#7095
25K → 30K152243-2228#7095#9323
30K → 20M20854-836#9323#10159
20M → 21M30578-549#10159#10708
21M → 35K42163-121#10708#10829
35K → 23M81332-251#10829#11080
23M → 24M48366-318#11080#11398
24M → 40K71119-48#11398#11446
40K → 25.2M3172-41#11446#11487
25.2M → Finish33421-388#11487#11875
TOTALS7437511-6771
📊

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