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BOSTON MARATHON 2026

Jacklyn Chen

Bib: 19603•F

CA

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0:00
0:00
/ mi
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Overall
#0 / 29021
Gender (Female)
#0 / 12578
Top 48%
Age Group (F18-39)
#0 / 5716
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: #17648
Start → 5K
25:11 | 8:07/mi
10K
51:15
6.21 mi
Rank: #18699 (-1051)
5K → 10K
26:04 | 8:24/mi
15K
1:18:21
9.32 mi
Rank: #19617 (-918)
10K → 15K
27:06 | 8:44/mi
20K
1:43:53
12.43 mi
Rank: #19136 (+481)
15K → 20K
25:32 | 8:14/mi
HALF
1:49:17
13.11 mi
Rank: #19005 (+131)
20K → HALF
5:24 | 7:56/mi
25K
2:09:22
15.53 mi
Rank: #18700 (+305)
HALF → 25K
20:05 | 8:17/mi
30K
2:35:59
18.64 mi
Rank: #18441 (+259)
25K → 30K
26:37 | 8:35/mi
20M
2:47:10
20.00 mi
Rank: #18148 (+293)
30K → 20M
11:11 | 8:14/mi
21M
2:55:48
21.00 mi
Rank: #17922 (+226)
20M → 21M
8:38 | 8:38/mi
35K
3:01:47
21.75 mi
Rank: #17779 (+143)
21M → 35K
5:59 | 8:00/mi
23M
3:12:01
23.00 mi
Rank: #17526 (+253)
35K → 23M
10:14 | 8:11/mi
24M
3:19:53
24.00 mi
Rank: #17298 (+228)
23M → 24M
7:52 | 7:52/mi
40K
3:26:39
24.85 mi
Rank: #17086 (+212)
24M → 40K
6:46 | 7:55/mi
25.2M
3:29:36
25.20 mi
Rank: #17010 (+76)
40K → 25.2M
2:57 | 8:34/mi
FINISH
3:37:25
26.22 mi
Rank: #16848 (+162)
25.2M → FINISH
7:49 | 7:41/mi

Splits & Pacing

Detailed breakdown of your race performance at each timing point

Half Splits

1st Half
via HALF
Distance13.11 mi
Time1:49:17
Pace8:21 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:48:08
Pace8:15 /mi
📊Negative Split: 1.1% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:09:1525:118:0725:11
8:07
-
10K
6.21 mi11:35:1951:158:1526:04
8:24
+0:17
15K
9.32 mi12:02:251:18:218:2527:06
8:44
+0:20
20K
12.43 mi12:27:571:43:538:2225:32
8:14
-0:30
HALF
13.11 mi12:33:211:49:178:215:24
7:56
-0:18
25K
15.53 mi12:53:262:09:228:2020:05
8:17
+0:21
30K
18.64 mi13:20:032:35:598:2326:37
8:35
+0:18
20M
20.00 mi13:31:142:47:108:2211:11
8:14
-0:21
21M
21.00 mi13:39:522:55:488:238:38
8:38
+0:24
35K
21.75 mi13:45:513:01:478:225:59
8:00
-0:38
23M
23.00 mi13:56:053:12:018:2110:14
8:11
+0:11
24M
24.00 mi14:03:573:19:538:207:52
7:52
-0:19
40K
24.85 mi14:10:433:26:398:196:46
7:55
+0:03
25.2M
25.20 mi14:13:403:29:368:202:57
8:34
+0:39
FINISH
26.22 mi14:21:293:37:258:187:49
7:41
-0:53

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

7:41 /mi

Average Pace

8:18 /mi

Slowest Pace

8:44 /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

2:32:07

70% of race

Time at Steady Pace

1:05:18

30% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:18 /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 mi11:09:1525:118:0725:11
8:07
#17648
10K
6.21 mi11:35:1951:158:1526:04
8:24
#18699
15K
9.32 mi12:02:251:18:218:2527:06
8:44
#19617
20K
12.43 mi12:27:571:43:538:2225:32
8:14
#19136
HALF
13.11 mi12:33:211:49:178:215:24
7:56
#19005
25K
15.53 mi12:53:262:09:228:2020:05
8:17
#18700
30K
18.64 mi13:20:032:35:598:2326:37
8:35
#18441
20M
20.00 mi13:31:142:47:108:2211:11
8:14
#18148
21M
21.00 mi13:39:522:55:488:238:38
8:38
#17922
35K
21.75 mi13:45:513:01:478:225:59
8:00
#17779
23M
23.00 mi13:56:053:12:018:2110:14
8:11
#17526
24M
24.00 mi14:03:573:19:538:207:52
7:52
#17298
40K
24.85 mi14:10:433:26:398:196:46
7:55
#17086
25.2M
25.20 mi14:13:403:29:368:202:57
8:34
#17010
FINISH
26.22 mi14:21:293:37:258:187:49
7:41
#16848
Faster pace
Steady pace
Slower pace

Rankings

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

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi176486300630021332(Top 74%)8295(Top 66%)8295(Top 145%)
10K6.21 mi3.10 mi18699-10516887-5876887-58719715(Top 68%)7436(Top 59%)7436(Top 130%)
15K9.32 mi3.11 mi19617-9187401-5147401-51421332(Top 74%)8295(Top 66%)8295(Top 145%)
20K12.43 mi3.11 mi19136+4817131+2707131+27017610(Top 61%)6284(Top 50%)6284(Top 110%)
HALF13.11 mi0.68 mi19005+1317063+687063+6816607(Top 57%)5699(Top 45%)5699(Top 100%)
25K15.53 mi2.42 mi18700+3056898+1656898+16517320(Top 60%)6176(Top 49%)6176(Top 108%)
30K18.64 mi3.11 mi18441+2596789+1096789+10917300(Top 60%)6282(Top 50%)6282(Top 110%)
20M20.00 mi1.36 mi18148+2936649+1406649+14014510(Top 50%)4779(Top 38%)4779(Top 84%)
21M21.00 mi1.00 mi17922+2266529+1206529+12014016(Top 48%)4602(Top 37%)4602(Top 81%)
35K21.75 mi0.75 mi17779+1436460+696460+6914546(Top 50%)4950(Top 39%)4950(Top 87%)
23M23.00 mi1.25 mi17526+2536343+1176343+11713683(Top 47%)4554(Top 36%)4554(Top 80%)
24M24.00 mi1.00 mi17298+2286228+1156228+11512865(Top 44%)4199(Top 33%)4199(Top 73%)
40K24.85 mi0.85 mi17086+2126135+936135+9311960(Top 41%)3781(Top 30%)3781(Top 66%)
25.2M25.20 mi0.35 mi17010+766098+376098+3712125(Top 42%)3955(Top 31%)3955(Top 69%)
FINISH26.22 mi1.02 mi16848+1626030+686030+6812801(Top 44%)4297(Top 34%)4297(Top 75%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 74%
×21
+97ft-345ft

Overall

21332

Females

8295

F18-39

8295

5K→10K

3.1 - 6.2 mi

Top 68%
×5
+79ft-138ft

Overall

19715

Females

7436

F18-39

7436

10K→15K

6.2 - 9.3 mi

Top 74%
×3
+67ft-78ft

Overall

21332

Females

8295

F18-39

8295

15K→20K

9.3 - 12.4 mi

Top 61%
×5
+106ft-86ft

Overall

17610

Females

6284

F18-39

6284

20K→HALF

12.4 - 13.1 mi

Top 57%
×2
+19ft-37ft

Overall

16607

Females

5699

F18-39

5699

HALF→25K

13.1 - 15.5 mi

Top 60%
×4
+66ft-88ft

Overall

17320

Females

6176

F18-39

6176

25K→30K

15.5 - 18.6 mi

Top 60%
×9
+181ft-148ft

Overall

17300

Females

6282

F18-39

6282

30K→20M

18.6 - 20.0 mi

Top 50%
×5
+64ft-50ft

Overall

14510

Females

4779

F18-39

4779

20M→21M

20.0 - 21.0 mi

Top 48%
×8
+106ft-24ft

Overall

14016

Females

4602

F18-39

4602

21M→35K

21.0 - 21.8 mi

Top 50%
×7
+17ft-86ft

Overall

14546

Females

4950

F18-39

4950

35K→23M

21.8 - 23.0 mi

Top 47%
×5
+23ft-63ft

Overall

13683

Females

4554

F18-39

4554

23M→24M

23.0 - 24.0 mi

Top 44%
×6
+12ft-82ft

Overall

12865

Females

4199

F18-39

4199

24M→40K

24.0 - 24.9 mi

Top 41%
×1
+6ft-20ft

Overall

11960

Females

3781

F18-39

3781

40K→25.2M

24.9 - 25.2 mi

Top 42%
×1
+13ft-16ft

Overall

12125

Females

3955

F18-39

3955

25.2M→FINISH

25.2 - 26.2 mi

Top 44%
×2
+22ft-21ft

Overall

12801

Females

4297

F18-39

4297

Passing

Athletes you passed and who passed you throughout the race

Passing Analysis

Category:
Athletes Passed
2950
Passed By
2150
Net Change
+800
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#17648
5K → 10K421093-1051#17648#18699
10K → 15K25943-918#18699#19617
15K → 20K49716+481#19617#19136
20K → HALF1332+131#19136#19005
HALF → 25K32520+305#19005#18700
25K → 30K31051+259#18700#18441
30K → 20M2963+293#18441#18148
20M → 21M2304+226#18148#17922
21M → 35K1474+143#17922#17779
35K → 23M2574+253#17779#17526
23M → 24M2291+228#17526#17298
24M → 40K2164+212#17298#17086
40K → 25.2M771+76#17086#17010
25.2M → FINISH1664+162#17010#16848
TOTALS29502150+800
📊

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