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BOSTON MARATHON 2026

Yifei Li

Bib: 31879•M

Masters
Boston Marathon logo
0:00
0:00
/ mi
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Overall
#0 / 29021
Top 35%
Gender (Male)
#0 / 16340
Top 48%
Masters (Masters Men)
#0 / 10617
Top 37%
Age Group (M40-44)
#0 / 2198
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
24:32
3.11 mi
Rank: #16152
Start → 5K
24:32 | 7:54/mi
10K
47:09
6.21 mi
Rank: #13603 (+2549)
5K → 10K
22:37 | 7:17/mi
15K
1:09:36
9.32 mi
Rank: #12529 (+1074)
10K → 15K
22:27 | 7:14/mi
20K
1:32:25
12.43 mi
Rank: #12025 (+504)
15K → 20K
22:49 | 7:21/mi
HALF
1:37:19
13.11 mi
Rank: #11929 (+96)
20K → HALF
4:54 | 7:12/mi
25K
1:54:59
15.53 mi
Rank: #11576 (+353)
HALF → 25K
17:40 | 7:18/mi
30K
2:18:04
18.64 mi
Rank: #11061 (+515)
25K → 30K
23:05 | 7:26/mi
20M
2:28:13
20.00 mi
Rank: #10858 (+203)
30K → 20M
10:09 | 7:29/mi
21M
2:36:04
21.00 mi
Rank: #10711 (+147)
20M → 21M
7:51 | 7:51/mi
35K
2:41:36
21.75 mi
Rank: #10662 (+49)
21M → 35K
5:32 | 7:24/mi
23M
2:51:03
23.00 mi
Rank: #10516 (+146)
35K → 23M
9:27 | 7:34/mi
24M
2:58:19
24.00 mi
Rank: #10379 (+137)
23M → 24M
7:16 | 7:16/mi
40K
3:04:39
24.85 mi
Rank: #10268 (+111)
24M → 40K
6:20 | 7:25/mi
25.2M
3:07:28
25.20 mi
Rank: #10232 (+36)
40K → 25.2M
2:49 | 8:11/mi
FINISH
3:14:49
26.22 mi
Rank: #10170 (+62)
25.2M → FINISH
7:21 | 7:13/mi
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Splits & Pacing

Detailed breakdown of your race performance at each timing point

Half Splits

1st Half⚖️ Balanced
via HALF
Distance13.11 mi
Time1:37:19
Pace7:26 /mi
2nd Half⚖️ Balanced
Distance13.11 mi
Time1:37:30
Pace7:27 /mi
📊Even Split: Consistent pacing between halves

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:53:0124:327:5424:32
7:54
-
10K
6.21 mi12:15:3847:097:3622:37
7:17
-0:37
15K
9.32 mi12:38:051:09:367:2922:27
7:14
-0:03
20K
12.43 mi13:00:541:32:257:2722:49
7:21
+0:07
HALF
13.11 mi13:05:481:37:197:264:54
7:12
-0:09
25K
15.53 mi13:23:281:54:597:2517:40
7:18
+0:06
30K
18.64 mi13:46:332:18:047:2523:05
7:26
+0:08
20M
20.00 mi13:56:422:28:137:2510:09
7:29
+0:03
21M
21.00 mi14:04:332:36:047:267:51
7:51
+0:22
35K
21.75 mi14:10:052:41:367:265:32
7:24
-0:27
23M
23.00 mi14:19:322:51:037:279:27
7:34
+0:10
24M
24.00 mi14:26:482:58:197:267:16
7:16
-0:18
40K
24.85 mi14:33:083:04:397:266:20
7:25
+0:09
25.2M
25.20 mi14:35:573:07:287:272:49
8:11
+0:46
FINISH
26.22 mi14:43:183:14:497:277:21
7:13
-0:58

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

7:12 /mi

Average Pace

7:26 /mi

Slowest Pace

8:11 /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

3:12:00

99% of race

Time at Steady Pace

2:49

1% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:26 /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 mi11:53:0124:327:5424:32
7:54
#16152
10K
6.21 mi12:15:3847:097:3622:37
7:17
#13603
15K
9.32 mi12:38:051:09:367:2922:27
7:14
#12529
20K
12.43 mi13:00:541:32:257:2722:49
7:21
#12025
HALF
13.11 mi13:05:481:37:197:264:54
7:12
#11929
25K
15.53 mi13:23:281:54:597:2517:40
7:18
#11576
30K
18.64 mi13:46:332:18:047:2523:05
7:26
#11061
20M
20.00 mi13:56:422:28:137:2510:09
7:29
#10858
21M
21.00 mi14:04:332:36:047:267:51
7:51
#10711
35K
21.75 mi14:10:052:41:367:265:32
7:24
#10662
23M
23.00 mi14:19:322:51:037:279:27
7:34
#10516
24M
24.00 mi14:26:482:58:197:267:16
7:16
#10379
40K
24.85 mi14:33:083:04:397:266:20
7:25
#10268
25.2M
25.20 mi14:35:573:07:287:272:49
8:11
#10232
FINISH
26.22 mi14:43:183:14:497:277:21
7:13
#10170
Faster pace
Steady pace
Slower pace

Rankings

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

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi16152106671066710332(Top 36%)8173(Top 50%)8173(Top 372%)
10K6.21 mi3.10 mi13603+25499680+9879680+98710953(Top 38%)8512(Top 52%)8512(Top 387%)
15K9.32 mi3.11 mi12529+10749221+4599221+45910332(Top 36%)8173(Top 50%)8173(Top 372%)
20K12.43 mi3.11 mi12025+5048975+2468975+24610576(Top 36%)8195(Top 50%)8195(Top 373%)
HALF13.11 mi0.68 mi11929+968930+458930+4510143(Top 35%)8038(Top 49%)8038(Top 366%)
25K15.53 mi2.42 mi11576+3538731+1998731+1999574(Top 33%)7622(Top 47%)7622(Top 347%)
30K18.64 mi3.11 mi11061+5158442+2898442+2899078(Top 31%)7217(Top 44%)7217(Top 328%)
20M20.00 mi1.36 mi10858+2038316+1268316+1268940(Top 31%)7039(Top 43%)7039(Top 320%)
21M21.00 mi1.00 mi10711+1478226+908226+908852(Top 31%)6863(Top 42%)6863(Top 312%)
35K21.75 mi0.75 mi10662+498182+448182+4410027(Top 35%)7485(Top 46%)7485(Top 341%)
23M23.00 mi1.25 mi10516+1468071+1118071+1119223(Top 32%)6997(Top 43%)6997(Top 318%)
24M24.00 mi1.00 mi10379+1377985+867985+868335(Top 29%)6442(Top 39%)6442(Top 293%)
40K24.85 mi0.85 mi10268+1117911+747911+748190(Top 28%)6285(Top 38%)6285(Top 286%)
25.2M25.20 mi0.35 mi10232+367882+297882+299339(Top 32%)6796(Top 42%)6796(Top 309%)
FINISH26.22 mi1.02 mi10170+627818+647818+649208(Top 32%)6708(Top 41%)6708(Top 305%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 36%
×21
+97ft-345ft

Overall

10332

Males

8173

M40-44

8173

5K→10K

3.1 - 6.2 mi

Top 38%
×5
+79ft-138ft

Overall

10953

Males

8512

M40-44

8512

10K→15K

6.2 - 9.3 mi

Top 36%
×3
+67ft-78ft

Overall

10332

Males

8173

M40-44

8173

15K→20K

9.3 - 12.4 mi

Top 36%
×5
+106ft-86ft

Overall

10576

Males

8195

M40-44

8195

20K→HALF

12.4 - 13.1 mi

Top 35%
×2
+19ft-37ft

Overall

10143

Males

8038

M40-44

8038

HALF→25K

13.1 - 15.5 mi

Top 33%
×4
+66ft-88ft

Overall

9574

Males

7622

M40-44

7622

25K→30K

15.5 - 18.6 mi

Top 31%
×9
+181ft-148ft

Overall

9078

Males

7217

M40-44

7217

30K→20M

18.6 - 20.0 mi

Top 31%
×5
+64ft-50ft

Overall

8940

Males

7039

M40-44

7039

20M→21M

20.0 - 21.0 mi

Top 31%
×8
+106ft-24ft

Overall

8852

Males

6863

M40-44

6863

21M→35K

21.0 - 21.8 mi

Top 35%
×7
+17ft-86ft

Overall

10027

Males

7485

M40-44

7485

35K→23M

21.8 - 23.0 mi

Top 32%
×5
+23ft-63ft

Overall

9223

Males

6997

M40-44

6997

23M→24M

23.0 - 24.0 mi

Top 29%
×6
+12ft-82ft

Overall

8335

Males

6442

M40-44

6442

24M→40K

24.0 - 24.9 mi

Top 28%
×1
+6ft-20ft

Overall

8190

Males

6285

M40-44

6285

40K→25.2M

24.9 - 25.2 mi

Top 32%
×1
+13ft-16ft

Overall

9339

Males

6796

M40-44

6796

25.2M→FINISH

25.2 - 26.2 mi

Top 32%
×2
+22ft-21ft

Overall

9208

Males

6708

M40-44

6708

Passing

Athletes you passed and who passed you throughout the race

Passing Analysis

Category:
Athletes Passed
6232
Passed By
250
Net Change
+5982
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#16152
5K → 10K25523+2549#16152#13603
10K → 15K10806+1074#13603#12529
15K → 20K51511+504#12529#12025
20K → HALF982+96#12025#11929
HALF → 25K3585+353#11929#11576
25K → 30K52914+515#11576#11061
30K → 20M22017+203#11061#10858
20M → 21M16720+147#10858#10711
21M → 35K8637+49#10711#10662
35K → 23M18539+146#10662#10516
23M → 24M15215+137#10516#10379
24M → 40K13221+111#10379#10268
40K → 25.2M5216+36#10268#10232
25.2M → FINISH10644+62#10232#10170
TOTALS6232250+5982
📊

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