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BOSTON MARATHON 2026

Yichun Sun

Bib: 20475•F

AB

Boston Marathon logo
0:00
0:00
/ mi
Masters
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Overall
#0 / 29021
Gender (Female)
#0 / 12578
Top 43%
Masters (Masters Women)
#0 / 6862
Top 28%
Age Group (F50-54)
#0 / 1233
Top 23%
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
24:49
3.11 mi
Rank: #16879
Start → 5K
24:49 | 8:00/mi
10K
49:33
6.21 mi
Rank: #16882 (-3)
5K → 10K
24:44 | 7:58/mi
15K
1:14:15
9.32 mi
Rank: #16801 (+81)
10K → 15K
24:42 | 7:58/mi
20K
1:39:10
12.43 mi
Rank: #16651 (+150)
15K → 20K
24:55 | 8:02/mi
HALF
1:44:33
13.11 mi
Rank: #16637 (+14)
20K → HALF
5:23 | 7:54/mi
25K
2:03:57
15.53 mi
Rank: #16404 (+233)
HALF → 25K
19:24 | 8:00/mi
30K
2:29:37
18.64 mi
Rank: #16184 (+220)
25K → 30K
25:40 | 8:16/mi
20M
2:40:56
20.00 mi
Rank: #16102 (+82)
30K → 20M
11:19 | 8:20/mi
21M
2:49:51
21.00 mi
Rank: #16030 (+72)
20M → 21M
8:55 | 8:55/mi
35K
2:55:54
21.75 mi
Rank: #15969 (+61)
21M → 35K
6:03 | 8:06/mi
23M
3:06:22
23.00 mi
Rank: #15878 (+91)
35K → 23M
10:28 | 8:22/mi
24M
3:14:27
24.00 mi
Rank: #15802 (+76)
23M → 24M
8:05 | 8:05/mi
40K
3:21:34
24.85 mi
Rank: #15738 (+64)
24M → 40K
7:07 | 8:20/mi
25.2M
3:24:47
25.20 mi
Rank: #15750 (-12)
40K → 25.2M
3:13 | 9:20/mi
FINISH
3:33:13
26.22 mi
Rank: #15777 (-27)
25.2M → FINISH
8:26 | 8:17/mi

Splits & Pacing

Detailed breakdown of your race performance at each timing point

Half Splits

1st HalfFaster
via HALF
Distance13.11 mi
Time1:44:33
Pace7:59 /mi
2nd Half
Distance13.11 mi
Time1:48:40
Pace8:18 /mi
📊Positive Split: 3.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:09:4024:498:0024:49
8:00
-
10K
6.21 mi11:34:2449:337:5924:44
7:58
-0:02
15K
9.32 mi11:59:061:14:157:5824:42
7:58
0:00
20K
12.43 mi12:24:011:39:107:5924:55
8:02
+0:04
HALF
13.11 mi12:29:241:44:337:595:23
7:54
-0:08
25K
15.53 mi12:48:482:03:577:5919:24
8:00
+0:06
30K
18.64 mi13:14:282:29:378:0225:40
8:16
+0:16
20M
20.00 mi13:25:472:40:568:0311:19
8:20
+0:04
21M
21.00 mi13:34:422:49:518:068:55
8:55
+0:35
35K
21.75 mi13:40:452:55:548:066:03
8:06
-0:49
23M
23.00 mi13:51:133:06:228:0710:28
8:22
+0:16
24M
24.00 mi13:59:183:14:278:078:05
8:05
-0:17
40K
24.85 mi14:06:253:21:348:077:07
8:20
+0:15
25.2M
25.20 mi14:09:383:24:478:083:13
9:20
+1:00
FINISH
26.22 mi14:18:043:33:138:098:26
8:17
-1:03

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

7:54 /mi

Average Pace

8:08 /mi

Slowest Pace

9:20 /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

3:21:05

94% of race

Time at Steady Pace

8:55

4% of race

Time at Slower Pace

3:13

2% of race

Average Pace: 8:08 /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 mi11:09:4024:498:0024:49
8:00
#16879
10K
6.21 mi11:34:2449:337:5924:44
7:58
#16882
15K
9.32 mi11:59:061:14:157:5824:42
7:58
#16801
20K
12.43 mi12:24:011:39:107:5924:55
8:02
#16651
HALF
13.11 mi12:29:241:44:337:595:23
7:54
#16637
25K
15.53 mi12:48:482:03:577:5919:24
8:00
#16404
30K
18.64 mi13:14:282:29:378:0225:40
8:16
#16184
20M
20.00 mi13:25:472:40:568:0311:19
8:20
#16102
21M
21.00 mi13:34:422:49:518:068:55
8:55
#16030
35K
21.75 mi13:40:452:55:548:066:03
8:06
#15969
23M
23.00 mi13:51:133:06:228:0710:28
8:22
#15878
24M
24.00 mi13:59:183:14:278:078:05
8:05
#15802
40K
24.85 mi14:06:253:21:348:077:07
8:20
#15738
25.2M
25.20 mi14:09:383:24:478:083:13
9:20
#15750
FINISH
26.22 mi14:18:043:33:138:098:26
8:17
#15777
Faster pace
Steady pace
Slower pace

Rankings

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

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF50-54Seg. OverallSeg. FemalesSeg. F50-54
5K3.11 mi3.11 mi168795850585016625(Top 57%)5687(Top 45%)5687(Top 461%)
10K6.21 mi3.10 mi16882-35867-175867-1716948(Top 58%)5883(Top 47%)5883(Top 477%)
15K9.32 mi3.11 mi16801+815806+615806+6116625(Top 57%)5687(Top 45%)5687(Top 461%)
20K12.43 mi3.11 mi16651+1505725+815725+8116265(Top 56%)5533(Top 44%)5533(Top 449%)
HALF13.11 mi0.68 mi16637+145722+35722+316374(Top 56%)5562(Top 44%)5562(Top 451%)
25K15.53 mi2.42 mi16404+2335595+1275595+12715424(Top 53%)5096(Top 41%)5096(Top 413%)
30K18.64 mi3.11 mi16184+2205519+765519+7615368(Top 53%)5177(Top 41%)5177(Top 420%)
20M20.00 mi1.36 mi16102+825480+395480+3915151(Top 52%)5153(Top 41%)5153(Top 418%)
21M21.00 mi1.00 mi16030+725461+195461+1915689(Top 54%)5515(Top 44%)5515(Top 447%)
35K21.75 mi0.75 mi15969+615438+235438+2315107(Top 52%)5246(Top 42%)5246(Top 425%)
23M23.00 mi1.25 mi15878+915412+265412+2614886(Top 51%)5207(Top 41%)5207(Top 422%)
24M24.00 mi1.00 mi15802+765380+325380+3214350(Top 49%)4994(Top 40%)4994(Top 405%)
40K24.85 mi0.85 mi15738+645366+145366+1414633(Top 50%)5230(Top 42%)5230(Top 424%)
25.2M25.20 mi0.35 mi15750-125378-125378-1216516(Top 57%)6234(Top 50%)6234(Top 506%)
FINISH26.22 mi1.02 mi15777-275419-415419-4116888(Top 58%)6438(Top 51%)6438(Top 522%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 57%
×21
+97ft-345ft

Overall

16625

Females

5687

F50-54

5687

5K→10K

3.1 - 6.2 mi

Top 58%
×5
+79ft-138ft

Overall

16948

Females

5883

F50-54

5883

10K→15K

6.2 - 9.3 mi

Top 57%
×3
+67ft-78ft

Overall

16625

Females

5687

F50-54

5687

15K→20K

9.3 - 12.4 mi

Top 56%
×5
+106ft-86ft

Overall

16265

Females

5533

F50-54

5533

20K→HALF

12.4 - 13.1 mi

Top 56%
×2
+19ft-37ft

Overall

16374

Females

5562

F50-54

5562

HALF→25K

13.1 - 15.5 mi

Top 53%
×4
+66ft-88ft

Overall

15424

Females

5096

F50-54

5096

25K→30K

15.5 - 18.6 mi

Top 53%
×9
+181ft-148ft

Overall

15368

Females

5177

F50-54

5177

30K→20M

18.6 - 20.0 mi

Top 52%
×5
+64ft-50ft

Overall

15151

Females

5153

F50-54

5153

20M→21M

20.0 - 21.0 mi

Top 54%
×8
+106ft-24ft

Overall

15689

Females

5515

F50-54

5515

21M→35K

21.0 - 21.8 mi

Top 52%
×7
+17ft-86ft

Overall

15107

Females

5246

F50-54

5246

35K→23M

21.8 - 23.0 mi

Top 51%
×5
+23ft-63ft

Overall

14886

Females

5207

F50-54

5207

23M→24M

23.0 - 24.0 mi

Top 49%
×6
+12ft-82ft

Overall

14350

Females

4994

F50-54

4994

24M→40K

24.0 - 24.9 mi

Top 50%
×1
+6ft-20ft

Overall

14633

Females

5230

F50-54

5230

40K→25.2M

24.9 - 25.2 mi

Top 57%
×1
+13ft-16ft

Overall

16516

Females

6234

F50-54

6234

25.2M→FINISH

25.2 - 26.2 mi

Top 58%
×2
+22ft-21ft

Overall

16888

Females

6438

F50-54

6438

Passing

Athletes you passed and who passed you throughout the race

Passing Analysis

Category:
Athletes Passed
2132
Passed By
1030
Net Change
+1102
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#16879
5K → 10K283286-3#16879#16882
10K → 15K236155+81#16882#16801
15K → 20K251101+150#16801#16651
20K → HALF3622+14#16651#16637
HALF → 25K26229+233#16637#16404
25K → 30K30787+220#16404#16184
30K → 20M12341+82#16184#16102
20M → 21M13159+72#16102#16030
21M → 35K8524+61#16030#15969
35K → 23M14049+91#15969#15878
23M → 24M10630+76#15878#15802
24M → 40K10238+64#15802#15738
40K → 25.2M2436-12#15738#15750
25.2M → FINISH4673-27#15750#15777
TOTALS21321030+1102
📊

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