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BOSTON MARATHON 2026

Bo-Kuai Lai

Bib: 13520•M

OH

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0:00
0:00
/ mi
Masters
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Overall
#0 / 29021
Top 33%
Gender (Male)
#0 / 16340
Top 46%
Masters (Masters Men)
#0 / 10617
Top 35%
Age Group (M50-54)
#0 / 1868
Top 34%
Race Day Weather
51°/41°F
overcast clouds

Race Timeline and Course Information

Your journey through the course with elevation, pacing, and checkpoint details

⏱️ Race Timeline

Watch your race unfold from start to finish

Start
0:00:00
Race begins
5K
22:50
3.11 mi
Rank: #11458
Start → 5K
22:50 | 7:21/mi
10K
45:34
6.21 mi
Rank: #11357 (+101)
5K → 10K
22:44 | 7:20/mi
15K
1:08:08
9.32 mi
Rank: #11123 (+234)
10K → 15K
22:34 | 7:16/mi
20K
1:31:07
12.43 mi
Rank: #11135 (-12)
15K → 20K
22:59 | 7:24/mi
HALF
1:36:01
13.11 mi
Rank: #11078 (+57)
20K → HALF
4:54 | 7:12/mi
25K
1:53:57
15.53 mi
Rank: #10952 (+126)
HALF → 25K
17:56 | 7:24/mi
30K
2:17:26
18.64 mi
Rank: #10724 (+228)
25K → 30K
23:29 | 7:34/mi
20M
2:27:37
20.00 mi
Rank: #10585 (+139)
30K → 20M
10:11 | 7:30/mi
21M
2:35:31
21.00 mi
Rank: #10453 (+132)
20M → 21M
7:54 | 7:54/mi
35K
2:41:01
21.75 mi
Rank: #10411 (+42)
21M → 35K
5:30 | 7:22/mi
23M
2:50:06
23.00 mi
Rank: #10133 (+278)
35K → 23M
9:05 | 7:16/mi
24M
2:57:13
24.00 mi
Rank: #9947 (+186)
23M → 24M
7:07 | 7:07/mi
40K
3:03:16
24.85 mi
Rank: #9740 (+207)
24M → 40K
6:03 | 7:05/mi
25.2M
3:05:57
25.20 mi
Rank: #9687 (+53)
40K → 25.2M
2:41 | 7:47/mi
FINISH
3:13:21
26.22 mi
Rank: #9653 (+34)
25.2M → FINISH
7:24 | 7:16/mi

Splits & Pacing

Detailed breakdown of your race performance at each timing point

Half Splits

1st HalfFaster
via HALF
Distance13.11 mi
Time1:36:01
Pace7:20 /mi
2nd Half
Distance13.11 mi
Time1:37:20
Pace7:26 /mi
📊Positive Split: 1.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:51:5822:507:2122:50
7:21
-
10K
6.21 mi11:14:4245:347:2022:44
7:20
-0:01
15K
9.32 mi11:37:161:08:087:1922:34
7:16
-0:04
20K
12.43 mi12:00:151:31:077:2022:59
7:24
+0:08
HALF
13.11 mi12:05:091:36:017:204:54
7:12
-0:12
25K
15.53 mi12:23:051:53:577:2117:56
7:24
+0:12
30K
18.64 mi12:46:342:17:267:2323:29
7:34
+0:10
20M
20.00 mi12:56:452:27:377:2310:11
7:30
-0:04
21M
21.00 mi13:04:392:35:317:257:54
7:54
+0:24
35K
21.75 mi13:10:092:41:017:255:30
7:22
-0:32
23M
23.00 mi13:19:142:50:067:249:05
7:16
-0:06
24M
24.00 mi13:26:212:57:137:247:07
7:07
-0:09
40K
24.85 mi13:32:243:03:167:236:03
7:05
-0:02
25.2M
25.20 mi13:35:053:05:577:232:41
7:47
+0:42
FINISH
26.22 mi13:42:293:13:217:237:24
7:16
-0:31

Checkpoint Splits Visualizations

Explore your race data through different visual perspectives. Scroll to discover each visualization.

📈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

7:05 /mi

Average Pace

7:23 /mi

Slowest Pace

7:54 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Bar length shows time spent in each segment. Colors mark your faster to slower segments, relative to your own pace.

Time at Faster Pace

3:05:27

96% of race

Time at Steady Pace

7:54

4% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:22 /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

Enhanced split table showing pace trends through mini sparkline visualizations.

Overall Pace Trend

CheckpointDistanceTime of DayTimeAvg PaceSegmentPaceTrendRank
5K
3.11 mi10:51:5822:507:2122:50
7:21
#11458
10K
6.21 mi11:14:4245:347:2022:44
7:20
#11357
15K
9.32 mi11:37:161:08:087:1922:34
7:16
#11123
20K
12.43 mi12:00:151:31:077:2022:59
7:24
#11135
HALF
13.11 mi12:05:091:36:017:204:54
7:12
#11078
25K
15.53 mi12:23:051:53:577:2117:56
7:24
#10952
30K
18.64 mi12:46:342:17:267:2323:29
7:34
#10724
20M
20.00 mi12:56:452:27:377:2310:11
7:30
#10585
21M
21.00 mi13:04:392:35:317:257:54
7:54
#10453
35K
21.75 mi13:10:092:41:017:255:30
7:22
#10411
23M
23.00 mi13:19:142:50:067:249:05
7:16
#10133
24M
24.00 mi13:26:212:57:137:247:07
7:07
#9947
40K
24.85 mi13:32:243:03:167:236:03
7:05
#9740
25.2M
25.20 mi13:35:053:05:577:232:41
7:47
#9687
FINISH
26.22 mi13:42:293:13:217:237:24
7:16
#9653
Faster pace
Steady pace
Slower pace

Rankings

Your position at each checkpoint and how you ranked in each segment

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi3.11 mi114588791879110677(Top 37%)8327(Top 51%)8327(Top 446%)
10K6.21 mi3.10 mi11357+1018722+698722+6911296(Top 39%)8650(Top 53%)8650(Top 463%)
15K9.32 mi3.11 mi11123+2348584+1388584+13810677(Top 37%)8327(Top 51%)8327(Top 446%)
20K12.43 mi3.11 mi11135-128561+238561+2311088(Top 38%)8415(Top 51%)8415(Top 450%)
HALF13.11 mi0.68 mi11078+578526+358526+3510133(Top 35%)8028(Top 49%)8028(Top 430%)
25K15.53 mi2.42 mi10952+1268442+848442+8410509(Top 36%)8084(Top 49%)8084(Top 433%)
30K18.64 mi3.11 mi10724+2288282+1608282+16010123(Top 35%)7766(Top 48%)7766(Top 416%)
20M20.00 mi1.36 mi10585+1398191+918191+919093(Top 31%)7120(Top 44%)7120(Top 381%)
21M21.00 mi1.00 mi10453+1328102+898102+899202(Top 32%)7055(Top 43%)7055(Top 378%)
35K21.75 mi0.75 mi10411+428061+418061+419678(Top 33%)7304(Top 45%)7304(Top 391%)
23M23.00 mi1.25 mi10133+2787886+1757886+1757173(Top 25%)5867(Top 36%)5867(Top 314%)
24M24.00 mi1.00 mi9947+1867782+1047782+1047271(Top 25%)5855(Top 36%)5855(Top 313%)
40K24.85 mi0.85 mi9740+2077661+1217661+1215979(Top 21%)4991(Top 31%)4991(Top 267%)
25.2M25.20 mi0.35 mi9687+537615+467615+466954(Top 24%)5545(Top 34%)5545(Top 297%)
FINISH26.22 mi1.02 mi9653+347560+557560+559561(Top 33%)6893(Top 42%)6893(Top 369%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 37%
×21
+97ft-345ft

Overall

10677

Males

8327

M50-54

8327

5K→10K

3.1 - 6.2 mi

Top 39%
×5
+79ft-138ft

Overall

11296

Males

8650

M50-54

8650

10K→15K

6.2 - 9.3 mi

Top 37%
×3
+67ft-78ft

Overall

10677

Males

8327

M50-54

8327

15K→20K

9.3 - 12.4 mi

Top 38%
×5
+106ft-86ft

Overall

11088

Males

8415

M50-54

8415

20K→HALF

12.4 - 13.1 mi

Top 35%
×2
+19ft-37ft

Overall

10133

Males

8028

M50-54

8028

HALF→25K

13.1 - 15.5 mi

Top 36%
×4
+66ft-88ft

Overall

10509

Males

8084

M50-54

8084

25K→30K

15.5 - 18.6 mi

Top 35%
×9
+181ft-148ft

Overall

10123

Males

7766

M50-54

7766

30K→20M

18.6 - 20.0 mi

Top 31%
×5
+64ft-50ft

Overall

9093

Males

7120

M50-54

7120

20M→21M

20.0 - 21.0 mi

Top 32%
×8
+106ft-24ft

Overall

9202

Males

7055

M50-54

7055

21M→35K

21.0 - 21.8 mi

Top 33%
×7
+17ft-86ft

Overall

9678

Males

7304

M50-54

7304

35K→23M

21.8 - 23.0 mi

Top 25%
×5
+23ft-63ft

Overall

7173

Males

5867

M50-54

5867

23M→24M

23.0 - 24.0 mi

Top 25%
×6
+12ft-82ft

Overall

7271

Males

5855

M50-54

5855

24M→40K

24.0 - 24.9 mi

Top 21%
×1
+6ft-20ft

Overall

5979

Males

4991

M50-54

4991

40K→25.2M

24.9 - 25.2 mi

Top 24%
×1
+13ft-16ft

Overall

6954

Males

5545

M50-54

5545

25.2M→FINISH

25.2 - 26.2 mi

Top 33%
×2
+22ft-21ft

Overall

9561

Males

6893

M50-54

6893

Passing

Athletes you passed and who passed you throughout the race

Passing Analysis

Category:
Athletes Passed
2566*
Passed By
759
Net Change
+1805
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#11458
5K → 10K302200+101#11458#11357
10K → 15K31076+234#11357#11123
15K → 20K130142-12#11123#11135
20K → HALF647+57#11135#11078
HALF → 25K20579+126#11078#10952
25K → 30K31183+228#10952#10724
30K → 20M16526+139#10724#10585
20M → 21M16533+132#10585#10453
21M → 35K6826+42#10453#10411
35K → 23M2857+278#10411#10133
23M → 24M193*7+186#10133#9947
24M → 40K2103+207#9947#9740
40K → 25.2M6310+53#9740#9687
25.2M → FINISH9560+34#9687#9653
TOTALS2566*759+1805

* Includes athletes who did not complete a segment (DNF/DNQ).

📊

Passing Analysis Visualizations

Explore your passing analysis through 5 different visualizations. Scroll to discover each one.

Time:
Category:

📈Position Graph

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🎨Heatmap Timeline

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🔄Passing Circle

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🌊Position Flow

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🏃Race Lanes

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Qualifying & Age Grade

See how your performance stacks up against qualifying standards

OTQ

Olympic Trials Qualifying analysis available

Activity Data

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Export & Support

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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing