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BOSTON MARATHON 2023

Tzu-Ming Yu

Bib: 14279•M

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Division (M50-54)
#0 / 2052
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent
Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
5K· 3.11 mi
7:43/mi
23:59
↑ 97↓ 3451.5%
10K· 6.21 mi
7:47/mi
48:09
↑ 79↓ 1380.4%
15K· 9.32 mi
7:53/mi
1:12:40
↑ 67↓ 78
20K· 12.43 mi
7:57/mi
1:37:22
↑ 106↓ 860.1%
Half· 13.11 mi
8:07/mi
1:42:54
↑ 19↓ 370.5%
25K· 15.53 mi
7:56/mi
2:02:07
↑ 66↓ 880.2%
30K· 18.64 mi
8:07/mi
2:27:19
↑ 181↓ 1480.2%
20M
8:12/mi
2:38:27
↑ 64↓ 500.2%
21M
8:51/mi
2:47:18
↑ 106↓ 241.6%
35K· 21.75 mi
8:25/mi
2:53:36
↑ 17↓ 861.7%
23M
8:49/mi
3:04:38
↑ 23↓ 630.6%
24M
9:04/mi
3:13:42
↓ 821.3%
40K· 24.85 mi
9:48/mi
3:22:05
↓ 200.3%
25.2M
10:18/mi
3:25:38
↑ 13↓ 160.2%
Finish· 26.22 mi
8:58/mi
3:34:46
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:42:54
Pace7:51 /mi
2nd Half
Distance13.11 mi
Time1:51:52
Pace8:32 /mi
📊Positive Split: 8.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:53:0523:597:4323:59
7:43
-
10K
6.21 mi11:17:1548:097:4524:10
7:47
+0:04
15K
9.32 mi11:41:461:12:407:4824:31
7:53
+0:06
20K
12.43 mi12:06:281:37:227:5024:42
7:57
+0:04
Half
13.11 mi12:12:001:42:547:515:32
8:07
+0:10
25K
15.53 mi12:31:132:02:077:5219:13
7:56
-0:11
30K
18.64 mi12:56:252:27:197:5425:12
8:07
+0:11
20M
20.00 mi13:07:332:38:277:5511:08
8:12
+0:05
21M
21.00 mi13:16:242:47:187:588:51
8:51
+0:39
35K
21.75 mi13:22:422:53:367:596:18
8:25
-0:26
23M
23.00 mi13:33:443:04:388:0211:02
8:49
+0:24
24M
24.00 mi13:42:483:13:428:049:04
9:04
+0:15
40K
24.85 mi13:51:113:22:058:088:23
9:48
+0:44
25.2M
25.20 mi13:54:443:25:388:103:33
10:18
+0:30
Finish
26.22 mi14:03:523:34:468:129:08
8:58
-1:20

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

7:43 /mi

Average Pace

8:12 /mi

Slowest Pace

10:18 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

48:09

22% of race

Time at Steady Pace

1:56:36

54% of race

Time at Slower Pace

50:01

23% of race

Average Pace: 8:11 /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 mi10:53:0523:597:4323:59
7:43
#11619
10K
6.21 mi11:17:1548:097:4524:10
7:47
#12255
15K
9.32 mi11:41:461:12:407:4824:31
7:53
#12646
20K
12.43 mi12:06:281:37:227:5024:42
7:57
#12714
Half
13.11 mi12:12:001:42:547:515:32
8:07
#12847
25K
15.53 mi12:31:132:02:077:5219:13
7:56
#12690
30K
18.64 mi12:56:252:27:197:5425:12
8:07
#12485
20M
20.00 mi13:07:332:38:277:5511:08
8:12
#12397
21M
21.00 mi13:16:242:47:187:588:51
8:51
#12379
35K
21.75 mi13:22:422:53:367:596:18
8:25
#12485
23M
23.00 mi13:33:443:04:388:0211:02
8:49
#12653
24M
24.00 mi13:42:483:13:428:049:04
9:04
#12917
40K
24.85 mi13:51:113:22:058:088:23
9:48
#13232
25.2M
25.20 mi13:54:443:25:388:103:33
10:18
#13332
Finish
26.22 mi14:03:523:34:468:129:08
8:58
#13566
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi3.11 mi116198953895313442(Top 50%)9679(Top 64%)9679(Top 472%)
10K6.21 mi3.10 mi12255-6369233-2809233-28012932(Top 49%)9526(Top 63%)9526(Top 464%)
15K9.32 mi3.11 mi12646-3919373-1409373-14013442(Top 50%)9679(Top 64%)9679(Top 472%)
20K12.43 mi3.11 mi12714-689384-119384-1113026(Top 49%)9449(Top 62%)9449(Top 460%)
Half13.11 mi0.68 mi12847-1339440-569440-5615153(Top 57%)10346(Top 68%)10346(Top 504%)
25K15.53 mi2.42 mi12690+1579345+959345+9512098(Top 45%)8950(Top 59%)8950(Top 436%)
30K18.64 mi3.11 mi12485+2059220+1259220+12511722(Top 44%)8683(Top 57%)8683(Top 423%)
20M20.00 mi1.36 mi12397+889168+529168+5211648(Top 44%)8553(Top 56%)8553(Top 417%)
21M21.00 mi1.00 mi12379+189145+239145+2312533(Top 47%)8817(Top 58%)8817(Top 430%)
35K21.75 mi0.75 mi12485-1069163-189163-1814809(Top 56%)9789(Top 65%)9789(Top 477%)
23M23.00 mi1.25 mi12653-1689216-539216-5315038(Top 56%)9820(Top 65%)9820(Top 479%)
24M24.00 mi1.00 mi12917-2649305-899305-8917503(Top 66%)10842(Top 71%)10842(Top 528%)
40K24.85 mi0.85 mi13232-3159420-1159420-11519388(Top 73%)11656(Top 77%)11656(Top 568%)
25.2M25.20 mi0.35 mi13332-1009441-219441-2118396(Top 69%)11188(Top 74%)11188(Top 545%)
Finish26.22 mi1.02 mi13566-2349524-839524-8317762(Top 67%)10946(Top 72%)10946(Top 533%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 50%
×21story building
+97ft-345ft

Overall

13442

Males

9679

M50-54

9679

5K→10K

3.1 - 6.2 mi

Top 49%
×5story building
+79ft-138ft

Overall

12932

Males

9526

M50-54

9526

10K→15K

6.2 - 9.3 mi

Top 50%
×3story building
+67ft-78ft

Overall

13442

Males

9679

M50-54

9679

15K→20K

9.3 - 12.4 mi

Top 49%
×5story building
+106ft-86ft

Overall

13026

Males

9449

M50-54

9449

20K→Half

12.4 - 13.1 mi

Top 57%
×2story building
+19ft-37ft

Overall

15153

Males

10346

M50-54

10346

Half→25K

13.1 - 15.5 mi

Top 45%
×4story building
+66ft-88ft

Overall

12098

Males

8950

M50-54

8950

25K→30K

15.5 - 18.6 mi

Top 44%
×9story building
+181ft-148ft

Overall

11722

Males

8683

M50-54

8683

30K→20M

18.6 - 20.0 mi

Top 44%
×5story building
+64ft-50ft

Overall

11648

Males

8553

M50-54

8553

20M→21M

20.0 - 21.0 mi

Top 47%
×8story building
+106ft-24ft

Overall

12533

Males

8817

M50-54

8817

21M→35K

21.0 - 21.8 mi

Top 56%
×7story building
+17ft-86ft

Overall

14809

Males

9789

M50-54

9789

35K→23M

21.8 - 23.0 mi

Top 56%
×5story building
+23ft-63ft

Overall

15038

Males

9820

M50-54

9820

23M→24M

23.0 - 24.0 mi

Top 66%
×6story building
+12ft-82ft

Overall

17503

Males

10842

M50-54

10842

24M→40K

24.0 - 24.9 mi

Top 73%
×1story
+6ft-20ft

Overall

19388

Males

11656

M50-54

11656

40K→25.2M

24.9 - 25.2 mi

Top 69%
×1story
+13ft-16ft

Overall

18396

Males

11188

M50-54

11188

25.2M→Finish

25.2 - 26.2 mi

Top 67%
×2story building
+22ft-21ft

Overall

17762

Males

10946

M50-54

10946

Passing Analysis

Category:
Athletes Passed
1259
Passed By
3206
Net Change
-1947
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#11619
5K → 10K108744-636#11619#12255
10K → 15K86477-391#12255#12646
15K → 20K161229-68#12646#12714
20K → Half10143-133#12714#12847
Half → 25K21659+157#12847#12690
25K → 30K30095+205#12690#12485
30K → 20M13749+88#12485#12397
20M → 21M10385+18#12397#12379
21M → 35K25131-106#12379#12485
35K → 23M44212-168#12485#12653
23M → 24M17281-264#12653#12917
24M → 40K14329-315#12917#13232
40K → 25.2M16116-100#13232#13332
25.2M → Finish22256-234#13332#13566
TOTALS12593206-1947
📊

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