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BOSTON MARATHON 2026

Chiachun Liu

Bib: 20551•F

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0:00
0:00
/ mi
Masters
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Overall
#0 / 29021
Gender (Female)
#0 / 12578
Masters (Masters Women)
#0 / 6862
Top 46%
Age Group (F40-44)
#0 / 1737
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
25:11
3.11 mi
Rank: #17655
Start → 5K
25:11 | 8:07/mi
10K
50:34
6.21 mi
Rank: #18013 (-358)
5K → 10K
25:23 | 8:11/mi
15K
1:16:07
9.32 mi
Rank: #18192 (-179)
10K → 15K
25:33 | 8:14/mi
20K
1:42:13
12.43 mi
Rank: #18319 (-127)
15K → 20K
26:06 | 8:25/mi
HALF
1:47:52
13.11 mi
Rank: #18341 (-22)
20K → HALF
5:39 | 8:18/mi
25K
2:08:15
15.53 mi
Rank: #18290 (+51)
HALF → 25K
20:23 | 8:25/mi
30K
2:35:39
18.64 mi
Rank: #18323 (-33)
25K → 30K
27:24 | 8:50/mi
20M
2:47:57
20.00 mi
Rank: #18385 (-62)
30K → 20M
12:18 | 9:04/mi
21M
2:57:54
21.00 mi
Rank: #18503 (-118)
20M → 21M
9:57 | 9:57/mi
35K
3:04:37
21.75 mi
Rank: #18549 (-46)
21M → 35K
6:43 | 8:59/mi
23M
3:15:51
23.00 mi
Rank: #18522 (+27)
35K → 23M
11:14 | 8:59/mi
24M
3:24:27
24.00 mi
Rank: #18495 (+27)
23M → 24M
8:36 | 8:36/mi
40K
3:32:05
24.85 mi
Rank: #18467 (+28)
24M → 40K
7:38 | 8:56/mi
25.2M
3:35:37
25.20 mi
Rank: #18494 (-27)
40K → 25.2M
3:32 | 10:15/mi
FINISH
3:44:48
26.22 mi
Rank: #18591 (-97)
25.2M → FINISH
9:11 | 9:01/mi

Splits & Pacing

Detailed breakdown of your race performance at each timing point

Half Splits

1st HalfFaster
via HALF
Distance13.11 mi
Time1:47:52
Pace8:14 /mi
2nd Half
Distance13.11 mi
Time1:56:56
Pace8:56 /mi
📊Positive Split: 8.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:09:5725:118:0725:11
8:07
-
10K
6.21 mi11:35:2050:348:0925:23
8:11
+0:04
15K
9.32 mi12:00:531:16:078:1025:33
8:14
+0:03
20K
12.43 mi12:26:591:42:138:1426:06
8:25
+0:11
HALF
13.11 mi12:32:381:47:528:145:39
8:18
-0:07
25K
15.53 mi12:53:012:08:158:1620:23
8:25
+0:07
30K
18.64 mi13:20:252:35:398:2127:24
8:50
+0:25
20M
20.00 mi13:32:432:47:578:2412:18
9:04
+0:14
21M
21.00 mi13:42:402:57:548:299:57
9:57
+0:53
35K
21.75 mi13:49:233:04:378:306:43
8:59
-0:58
23M
23.00 mi14:00:373:15:518:3111:14
8:59
0:00
24M
24.00 mi14:09:133:24:278:328:36
8:36
-0:23
40K
24.85 mi14:16:513:32:058:327:38
8:56
+0:20
25.2M
25.20 mi14:20:233:35:378:343:32
10:15
+1:19
FINISH
26.22 mi14:29:343:44:488:359:11
9:01
-1:14

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

8:07 /mi

Average Pace

8:35 /mi

Slowest Pace

10:15 /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

2:08:15

57% of race

Time at Steady Pace

1:23:04

37% of race

Time at Slower Pace

13:29

6% of race

Average Pace: 8:34 /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 mi11:09:5725:118:0725:11
8:07
#17655
10K
6.21 mi11:35:2050:348:0925:23
8:11
#18013
15K
9.32 mi12:00:531:16:078:1025:33
8:14
#18192
20K
12.43 mi12:26:591:42:138:1426:06
8:25
#18319
HALF
13.11 mi12:32:381:47:528:145:39
8:18
#18341
25K
15.53 mi12:53:012:08:158:1620:23
8:25
#18290
30K
18.64 mi13:20:252:35:398:2127:24
8:50
#18323
20M
20.00 mi13:32:432:47:578:2412:18
9:04
#18385
21M
21.00 mi13:42:402:57:548:299:57
9:57
#18503
35K
21.75 mi13:49:233:04:378:306:43
8:59
#18549
23M
23.00 mi14:00:373:15:518:3111:14
8:59
#18522
24M
24.00 mi14:09:133:24:278:328:36
8:36
#18495
40K
24.85 mi14:16:513:32:058:327:38
8:56
#18467
25.2M
25.20 mi14:20:233:35:378:343:32
10:15
#18494
FINISH
26.22 mi14:29:343:44:488:359:11
9:01
#18591
Faster pace
Steady pace
Slower pace

Rankings

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

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF40-44Seg. OverallSeg. FemalesSeg. F40-44
5K3.11 mi3.11 mi176556307630718514(Top 64%)6769(Top 54%)6769(Top 390%)
10K6.21 mi3.10 mi18013-3586507-2006507-20018416(Top 63%)6701(Top 53%)6701(Top 386%)
15K9.32 mi3.11 mi18192-1796595-886595-8818514(Top 64%)6769(Top 54%)6769(Top 390%)
20K12.43 mi3.11 mi18319-1276663-686663-6818733(Top 65%)6932(Top 55%)6932(Top 399%)
HALF13.11 mi0.68 mi18341-226679-166679-1619008(Top 65%)7054(Top 56%)7054(Top 406%)
25K15.53 mi2.42 mi18290+516665+146665+1418038(Top 62%)6582(Top 52%)6582(Top 379%)
30K18.64 mi3.11 mi18323-336719-546719-5418688(Top 64%)7046(Top 56%)7046(Top 406%)
20M20.00 mi1.36 mi18385-626778-596778-5919216(Top 66%)7386(Top 59%)7386(Top 425%)
21M21.00 mi1.00 mi18503-1186857-796857-7920270(Top 70%)7995(Top 64%)7995(Top 460%)
35K21.75 mi0.75 mi18549-466887-306887-3019962(Top 69%)7919(Top 63%)7919(Top 456%)
23M23.00 mi1.25 mi18522+276897-106897-1018398(Top 63%)7168(Top 57%)7168(Top 413%)
24M24.00 mi1.00 mi18495+276901-46901-417514(Top 60%)6746(Top 54%)6746(Top 388%)
40K24.85 mi0.85 mi18467+286905-46905-418063(Top 62%)7073(Top 56%)7073(Top 407%)
25.2M25.20 mi0.35 mi18494-276921-166921-1620268(Top 70%)8194(Top 65%)8194(Top 472%)
FINISH26.22 mi1.02 mi18591-976999-786999-7820572(Top 71%)8353(Top 66%)8353(Top 481%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 64%
×21
+97ft-345ft

Overall

18514

Females

6769

F40-44

6769

5K→10K

3.1 - 6.2 mi

Top 63%
×5
+79ft-138ft

Overall

18416

Females

6701

F40-44

6701

10K→15K

6.2 - 9.3 mi

Top 64%
×3
+67ft-78ft

Overall

18514

Females

6769

F40-44

6769

15K→20K

9.3 - 12.4 mi

Top 65%
×5
+106ft-86ft

Overall

18733

Females

6932

F40-44

6932

20K→HALF

12.4 - 13.1 mi

Top 65%
×2
+19ft-37ft

Overall

19008

Females

7054

F40-44

7054

HALF→25K

13.1 - 15.5 mi

Top 62%
×4
+66ft-88ft

Overall

18038

Females

6582

F40-44

6582

25K→30K

15.5 - 18.6 mi

Top 64%
×9
+181ft-148ft

Overall

18688

Females

7046

F40-44

7046

30K→20M

18.6 - 20.0 mi

Top 66%
×5
+64ft-50ft

Overall

19216

Females

7386

F40-44

7386

20M→21M

20.0 - 21.0 mi

Top 70%
×8
+106ft-24ft

Overall

20270

Females

7995

F40-44

7995

21M→35K

21.0 - 21.8 mi

Top 69%
×7
+17ft-86ft

Overall

19962

Females

7919

F40-44

7919

35K→23M

21.8 - 23.0 mi

Top 63%
×5
+23ft-63ft

Overall

18398

Females

7168

F40-44

7168

23M→24M

23.0 - 24.0 mi

Top 60%
×6
+12ft-82ft

Overall

17514

Females

6746

F40-44

6746

24M→40K

24.0 - 24.9 mi

Top 62%
×1
+6ft-20ft

Overall

18063

Females

7073

F40-44

7073

40K→25.2M

24.9 - 25.2 mi

Top 70%
×1
+13ft-16ft

Overall

20268

Females

8194

F40-44

8194

25.2M→FINISH

25.2 - 26.2 mi

Top 71%
×2
+22ft-21ft

Overall

20572

Females

8353

F40-44

8353

Passing

Athletes you passed and who passed you throughout the race

Passing Analysis

Category:
Athletes Passed
1207
Passed By
2143
Net Change
-936
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#17655
5K → 10K141499-358#17655#18013
10K → 15K120299-179#18013#18192
15K → 20K124251-127#18192#18319
20K → HALF2446-22#18319#18341
HALF → 25K14392+51#18341#18290
25K → 30K178211-33#18290#18323
30K → 20M73135-62#18323#18385
20M → 21M46164-118#18385#18503
21M → 35K4389-46#18503#18549
35K → 23M9972+27#18549#18522
23M → 24M7447+27#18522#18495
24M → 40K7850+28#18495#18467
40K → 25.2M2249-27#18467#18494
25.2M → FINISH42139-97#18494#18591
TOTALS12072143-936
📊

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