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BOSTON MARATHON 2024

Kuangyi Tsai

Bib: 24737•M

CA

0:00
0:00
/ mi
Masters
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Overall
#0 / 25550
Gender (Male)
#0 / 14578
Masters (Masters Men)
#0 / 9729
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
23:12
Rank: #10475
Start → 5K
7:28/mi
23:12 split
10K· 6.21 mi
47:13
Rank: #11273 (-798)
5K → 10K
7:44/mi
24:01 split
15K· 9.32 mi
1:12:39
Rank: #12475 (-1202)
10K → 15K
8:11/mi
25:26 split
20K· 12.43 mi
1:41:01
Rank: #14247 (-1772)
15K → 20K
9:08/mi
28:22 split
Half· 13.11 mi
1:46:47
Rank: #14316 (-69)
20K → Half
8:27/mi
5:46 split
25K· 15.53 mi
2:10:04
Rank: #15053 (-737)
Half → 25K
9:36/mi
23:17 split
30K· 18.64 mi
2:39:41
Rank: #15173 (-120)
25K → 30K
9:32/mi
29:37 split
20M
2:52:44
Rank: #15172 (+1)
30K → 20M
9:36/mi
13:03 split
21M
3:04:04
Rank: #15339 (-167)
20M → 21M
11:20/mi
11:20 split
35K· 21.75 mi
3:10:57
Rank: #15307 (+32)
21M → 35K
9:12/mi
6:53 split
23M
3:22:19
Rank: #15069 (+238)
35K → 23M
9:05/mi
11:22 split
24M
3:31:30
Rank: #14963 (+106)
23M → 24M
9:11/mi
9:11 split
40K· 24.85 mi
3:39:32
Rank: #14837 (+126)
24M → 40K
9:24/mi
8:02 split
25.2M
3:43:37
Rank: #14880 (-43)
40K → 25.2M
11:50/mi
4:05 split
Finish· 26.22 mi
3:52:46
Rank: #14824 (+56)
25.2M → Finish
8:59/mi
9:09 split

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:46:47
Pace8:09 /mi
2nd Half
Distance13.11 mi
Time2:05:59
Pace9:37 /mi
📊Positive Split: 18.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:38:2223:127:2823:12
7:28
-
10K
6.21 mi12:02:2347:137:3624:01
7:44
+0:16
15K
9.32 mi12:27:491:12:397:4825:26
8:11
+0:27
20K
12.43 mi12:56:111:41:018:0828:22
9:08
+0:57
Half
13.11 mi13:01:571:46:478:095:46
8:27
-0:41
25K
15.53 mi13:25:142:10:048:2223:17
9:36
+1:09
30K
18.64 mi13:54:512:39:418:3429:37
9:32
-0:04
20M
20.00 mi14:07:542:52:448:3813:03
9:36
+0:04
21M
21.00 mi14:19:143:04:048:4611:20
11:20
+1:44
35K
21.75 mi14:26:073:10:578:476:53
9:12
-2:08
23M
23.00 mi14:37:293:22:198:4811:22
9:05
-0:07
24M
24.00 mi14:46:403:31:308:499:11
9:11
+0:06
40K
24.85 mi14:54:423:39:328:508:02
9:24
+0:13
25.2M
25.20 mi14:58:473:43:378:524:05
11:50
+2:26
Finish
26.22 mi15:07:563:52:468:539:09
8:59
-2:51

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

7:28 /mi

Average Pace

8:53 /mi

Slowest Pace

11:50 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:18:25

34% of race

Time at Steady Pace

2:18:56

60% of race

Time at Slower Pace

15:25

7% of race

Average Pace: 8:53 /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 mi11:38:2223:127:2823:12
7:28
#10475
10K
6.21 mi12:02:2347:137:3624:01
7:44
#11273
15K
9.32 mi12:27:491:12:397:4825:26
8:11
#12475
20K
12.43 mi12:56:111:41:018:0828:22
9:08
#14247
Half
13.11 mi13:01:571:46:478:095:46
8:27
#14316
25K
15.53 mi13:25:142:10:048:2223:17
9:36
#15053
30K
18.64 mi13:54:512:39:418:3429:37
9:32
#15173
20M
20.00 mi14:07:542:52:448:3813:03
9:36
#15172
21M
21.00 mi14:19:143:04:048:4611:20
11:20
#15339
35K
21.75 mi14:26:073:10:578:476:53
9:12
#15307
23M
23.00 mi14:37:293:22:198:4811:22
9:05
#15069
24M
24.00 mi14:46:403:31:308:499:11
9:11
#14963
40K
24.85 mi14:54:423:39:328:508:02
9:24
#14837
25.2M
25.20 mi14:58:473:43:378:524:05
11:50
#14880
Finish
26.22 mi15:07:563:52:468:539:09
8:59
#14824
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi104758187818714638(Top 57%)9856(Top 68%)9856(Top 444%)
10K6.21 mi3.10 mi11273-7988492-3058492-30512090(Top 47%)8822(Top 61%)8822(Top 398%)
15K9.32 mi3.11 mi12475-12028997-5058997-50514638(Top 57%)9856(Top 68%)9856(Top 444%)
20K12.43 mi3.11 mi14247-17729704-7079704-70717892(Top 70%)11205(Top 77%)11205(Top 505%)
Half13.11 mi0.68 mi14316-699721-179721-1715385(Top 60%)10083(Top 69%)10083(Top 455%)
25K15.53 mi2.42 mi15053-7379992-2719992-27117873(Top 70%)11081(Top 76%)11081(Top 500%)
30K18.64 mi3.11 mi15173-1209957+359957+3515576(Top 61%)9817(Top 67%)9817(Top 443%)
20M20.00 mi1.36 mi15172+19906+519906+5114936(Top 58%)9272(Top 64%)9272(Top 418%)
21M21.00 mi1.00 mi15339-1679935-299935-2917205(Top 67%)10210(Top 70%)10210(Top 460%)
35K21.75 mi0.75 mi15307+329897+389897+3814242(Top 56%)8754(Top 60%)8754(Top 395%)
23M23.00 mi1.25 mi15069+2389755+1429755+14211566(Top 45%)7351(Top 50%)7351(Top 331%)
24M24.00 mi1.00 mi14963+1069656+999656+9913022(Top 51%)8054(Top 55%)8054(Top 363%)
40K24.85 mi0.85 mi14837+1269566+909566+9012685(Top 50%)7774(Top 53%)7774(Top 350%)
25.2M25.20 mi0.35 mi14880-439575-99575-916928(Top 66%)9886(Top 68%)9886(Top 446%)
Finish26.22 mi1.02 mi14824+569513+629513+6214083(Top 55%)8538(Top 59%)8538(Top 385%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 57%
×21story building
+97ft-345ft

Overall

14638

Males

9856

M45-49

9856

5K→10K

3.1 - 6.2 mi

Top 47%
×5story building
+79ft-138ft

Overall

12090

Males

8822

M45-49

8822

10K→15K

6.2 - 9.3 mi

Top 57%
×3story building
+67ft-78ft

Overall

14638

Males

9856

M45-49

9856

15K→20K

9.3 - 12.4 mi

Top 70%
×5story building
+106ft-86ft

Overall

17892

Males

11205

M45-49

11205

20K→Half

12.4 - 13.1 mi

Top 60%
×2story building
+19ft-37ft

Overall

15385

Males

10083

M45-49

10083

Half→25K

13.1 - 15.5 mi

Top 70%
×4story building
+66ft-88ft

Overall

17873

Males

11081

M45-49

11081

25K→30K

15.5 - 18.6 mi

Top 61%
×9story building
+181ft-148ft

Overall

15576

Males

9817

M45-49

9817

30K→20M

18.6 - 20.0 mi

Top 58%
×5story building
+64ft-50ft

Overall

14936

Males

9272

M45-49

9272

20M→21M

20.0 - 21.0 mi

Top 67%
×8story building
+106ft-24ft

Overall

17205

Males

10210

M45-49

10210

21M→35K

21.0 - 21.8 mi

Top 56%
×7story building
+17ft-86ft

Overall

14242

Males

8754

M45-49

8754

35K→23M

21.8 - 23.0 mi

Top 45%
×5story building
+23ft-63ft

Overall

11566

Males

7351

M45-49

7351

23M→24M

23.0 - 24.0 mi

Top 51%
×6story building
+12ft-82ft

Overall

13022

Males

8054

M45-49

8054

24M→40K

24.0 - 24.9 mi

Top 50%
×1story
+6ft-20ft

Overall

12685

Males

7774

M45-49

7774

40K→25.2M

24.9 - 25.2 mi

Top 66%
×1story
+13ft-16ft

Overall

16928

Males

9886

M45-49

9886

25.2M→Finish

25.2 - 26.2 mi

Top 55%
×2story building
+22ft-21ft

Overall

14083

Males

8538

M45-49

8538

Passing Analysis

Category:
Athletes Passed
1432
Passed By
5781
Net Change
-4349
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#10475
5K → 10K77875-798#10475#11273
10K → 15K371239-1202#11273#12475
15K → 20K301802-1772#12475#14247
20K → Half3099-69#14247#14316
Half → 25K71808-737#14316#15053
25K → 30K228348-120#15053#15173
30K → 20M119118+1#15173#15172
20M → 21M77244-167#15172#15339
21M → 35K7543+32#15339#15307
35K → 23M25214+238#15307#15069
23M → 24M14741+106#15069#14963
24M → 40K15529+126#14963#14837
40K → 25.2M2770-43#14837#14880
25.2M → Finish10751+56#14880#14824
TOTALS14325781-4349
📊

Passing Visuals

Category:
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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