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BOSTON MARATHON 2026

Ka Lung Stephen Li

Bib: 12398•M

Masters
Boston Marathon logo
0:00
0:00
/ mi
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Overall
#0 / 29021
Top 31%
Gender (Male)
#0 / 16340
Top 44%
Masters (Masters Men)
#0 / 10617
Top 32%
Age Group (M45-49)
#0 / 2413
Top 50%
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· 3.11 mi
21:33
Rank: #8040
Start → 5K
21:33 | 6:57/mi
10K· 6.21 mi
43:48
Rank: #8957 (-917)
5K → 10K
22:15 | 7:10/mi
15K· 9.32 mi
1:06:00
Rank: #9146 (-189)
10K → 15K
22:12 | 7:09/mi
20K· 12.43 mi
1:28:10
Rank: #9051 (+95)
15K → 20K
22:10 | 7:09/mi
HALF· 13.11 mi
1:33:01
Rank: #9073 (-22)
20K → HALF
4:51 | 7:07/mi
25K· 15.53 mi
1:50:30
Rank: #9027 (+46)
HALF → 25K
17:29 | 7:13/mi
30K· 18.64 mi
2:13:45
Rank: #9037 (-10)
25K → 30K
23:15 | 7:30/mi
20M
2:24:06
Rank: #9057 (-20)
30K → 20M
10:21 | 7:38/mi
21M
2:32:08
Rank: #9089 (-32)
20M → 21M
8:02 | 8:02/mi
35K· 21.75 mi
2:37:41
Rank: #9104 (-15)
21M → 35K
5:33 | 7:26/mi
23M
2:47:20
Rank: #9112 (-8)
35K → 23M
9:39 | 7:43/mi
24M
2:54:53
Rank: #9128 (-16)
23M → 24M
7:33 | 7:33/mi
40K· 24.85 mi
3:01:24
Rank: #9107 (+21)
24M → 40K
6:31 | 7:38/mi
25.2M
3:04:15
Rank: #9106 (+1)
40K → 25.2M
2:51 | 8:16/mi
FINISH· 26.22 mi
3:11:42
Rank: #9097 (+9)
25.2M → FINISH
7:27 | 7:19/mi
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Splits & Pacing

Detailed breakdown of your race performance at each timing point

Half Splits

1st HalfFaster
via HALF
Distance13.11 mi
Time1:33:01
Pace7:06 /mi
2nd Half
Distance13.11 mi
Time1:38:41
Pace7:32 /mi
📊Positive Split: 6.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:49:3721:336:5721:33
6:57
-
10K
6.21 mi11:11:5243:487:0322:15
7:10
+0:13
15K
9.32 mi11:34:041:06:007:0522:12
7:09
-0:01
20K
12.43 mi11:56:141:28:107:0622:10
7:09
0:00
HALF
13.11 mi12:01:051:33:017:064:51
7:07
-0:02
25K
15.53 mi12:18:341:50:307:0717:29
7:13
+0:06
30K
18.64 mi12:41:492:13:457:1123:15
7:30
+0:17
20M
20.00 mi12:52:102:24:067:1310:21
7:38
+0:08
21M
21.00 mi13:00:122:32:087:158:02
8:02
+0:24
35K
21.75 mi13:05:452:37:417:165:33
7:26
-0:36
23M
23.00 mi13:15:242:47:207:179:39
7:43
+0:17
24M
24.00 mi13:22:572:54:537:187:33
7:33
-0:10
40K
24.85 mi13:29:283:01:247:186:31
7:38
+0:05
25.2M
25.20 mi13:32:193:04:157:192:51
8:16
+0:38
FINISH
26.22 mi13:39:463:11:427:207:27
7:19
-0:57

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

6:57 /mi

Average Pace

7:19 /mi

Slowest Pace

8:16 /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

2:51:10

89% of race

Time at Steady Pace

17:41

9% of race

Time at Slower Pace

2:51

1% of race

Average Pace: 7:19 /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 mi10:49:3721:336:5721:33
6:57
#8040
10K
6.21 mi11:11:5243:487:0322:15
7:10
#8957
15K
9.32 mi11:34:041:06:007:0522:12
7:09
#9146
20K
12.43 mi11:56:141:28:107:0622:10
7:09
#9051
HALF
13.11 mi12:01:051:33:017:064:51
7:07
#9073
25K
15.53 mi12:18:341:50:307:0717:29
7:13
#9027
30K
18.64 mi12:41:492:13:457:1123:15
7:30
#9037
20M
20.00 mi12:52:102:24:067:1310:21
7:38
#9057
21M
21.00 mi13:00:122:32:087:158:02
8:02
#9089
35K
21.75 mi13:05:452:37:417:165:33
7:26
#9104
23M
23.00 mi13:15:242:47:207:179:39
7:43
#9112
24M
24.00 mi13:22:572:54:537:187:33
7:33
#9128
40K
24.85 mi13:29:283:01:247:186:31
7:38
#9107
25.2M
25.20 mi13:32:193:04:157:192:51
8:16
#9106
FINISH
26.22 mi13:39:463:11:427:207:27
7:19
#9097
Faster pace
Steady pace
Slower pace

Rankings

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

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi8040692469249633(Top 33%)7835(Top 48%)7835(Top 325%)
10K6.21 mi3.10 mi8957-9177491-5677491-5679906(Top 34%)8004(Top 49%)8004(Top 332%)
15K9.32 mi3.11 mi9146-1897597-1067597-1069633(Top 33%)7835(Top 48%)7835(Top 325%)
20K12.43 mi3.11 mi9051+957526+717526+718827(Top 30%)7317(Top 45%)7317(Top 303%)
HALF13.11 mi0.68 mi9073-227538-127538-129517(Top 33%)7729(Top 47%)7729(Top 320%)
25K15.53 mi2.42 mi9027+467481+577481+578943(Top 31%)7290(Top 45%)7290(Top 302%)
30K18.64 mi3.11 mi9037-107446+357446+359533(Top 33%)7441(Top 46%)7441(Top 308%)
20M20.00 mi1.36 mi9057-207426+207426+209960(Top 34%)7557(Top 46%)7557(Top 313%)
21M21.00 mi1.00 mi9089-327404+227404+2210077(Top 35%)7506(Top 46%)7506(Top 311%)
35K21.75 mi0.75 mi9104-157395+97395+910173(Top 35%)7559(Top 46%)7559(Top 313%)
23M23.00 mi1.25 mi9112-87367+287367+2810348(Top 36%)7533(Top 46%)7533(Top 312%)
24M24.00 mi1.00 mi9128-167346+217346+2110428(Top 36%)7514(Top 46%)7514(Top 311%)
40K24.85 mi0.85 mi9107+217310+367310+369718(Top 33%)7061(Top 43%)7061(Top 293%)
25.2M25.20 mi0.35 mi9106+17306+47306+49947(Top 34%)7097(Top 43%)7097(Top 294%)
FINISH26.22 mi1.02 mi9097+97264+427264+429943(Top 34%)7087(Top 43%)7087(Top 294%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 33%
×21stories
+97ft-345ft

Overall

9633

Males

7835

M45-49

7835

5K→10K

3.1 - 6.2 mi

Top 34%
×5stories
+79ft-138ft

Overall

9906

Males

8004

M45-49

8004

10K→15K

6.2 - 9.3 mi

Top 33%
×3stories
+67ft-78ft

Overall

9633

Males

7835

M45-49

7835

15K→20K

9.3 - 12.4 mi

Top 30%
×5stories
+106ft-86ft

Overall

8827

Males

7317

M45-49

7317

20K→HALF

12.4 - 13.1 mi

Top 33%
×2stories
+19ft-37ft

Overall

9517

Males

7729

M45-49

7729

HALF→25K

13.1 - 15.5 mi

Top 31%
×4stories
+66ft-88ft

Overall

8943

Males

7290

M45-49

7290

25K→30K

15.5 - 18.6 mi

Top 33%
×9stories
+181ft-148ft

Overall

9533

Males

7441

M45-49

7441

30K→20M

18.6 - 20.0 mi

Top 34%
×5stories
+64ft-50ft

Overall

9960

Males

7557

M45-49

7557

20M→21M

20.0 - 21.0 mi

Top 35%
×8stories
+106ft-24ft

Overall

10077

Males

7506

M45-49

7506

21M→35K

21.0 - 21.8 mi

Top 35%
×7stories
+17ft-86ft

Overall

10173

Males

7559

M45-49

7559

35K→23M

21.8 - 23.0 mi

Top 36%
×5stories
+23ft-63ft

Overall

10348

Males

7533

M45-49

7533

23M→24M

23.0 - 24.0 mi

Top 36%
×6stories
+12ft-82ft

Overall

10428

Males

7514

M45-49

7514

24M→40K

24.0 - 24.9 mi

Top 33%
×1story
+6ft-20ft

Overall

9718

Males

7061

M45-49

7061

40K→25.2M

24.9 - 25.2 mi

Top 34%
×1story
+13ft-16ft

Overall

9947

Males

7097

M45-49

7097

25.2M→FINISH

25.2 - 26.2 mi

Top 34%
×2stories
+22ft-21ft

Overall

9943

Males

7087

M45-49

7087

Passing

Athletes you passed and who passed you throughout the race

Passing Analysis

Category:
Athletes Passed
1135
Passed By
2192
Net Change
-1057
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#8040
5K → 10K33950-917#8040#8957
10K → 15K75264-189#8957#9146
15K → 20K18388+95#9146#9051
20K → HALF1032-22#9051#9073
HALF → 25K12882+46#9073#9027
25K → 30K168178-10#9027#9037
30K → 20M85105-20#9037#9057
20M → 21M69101-32#9057#9089
21M → 35K5671-15#9089#9104
35K → 23M9098-8#9104#9112
23M → 24M5571-16#9112#9128
24M → 40K7049+21#9128#9107
40K → 25.2M3130+1#9107#9106
25.2M → FINISH8273+9#9106#9097
TOTALS11352192-1057
📊

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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Activity Data

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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing