Boston Marathon logo
BOSTON MARATHON 2023

Zhijun Huang

Bib: 21691•F

CA

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 26622
Gender (Female)
#0 / 11423
Masters (Masters Women)
#0 / 6539
Division (F45-49)
#0 / 1817
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
26:43
Rank: #18246
Start → 5K
26:43 | 8:36/mi
10K· 6.21 mi
54:09
Rank: #19201 (-955)
5K → 10K
27:26 | 8:50/mi
15K· 9.32 mi
1:22:29
Rank: #19868 (-667)
10K → 15K
28:20 | 9:07/mi
20K· 12.43 mi
1:51:39
Rank: #20291 (-423)
15K → 20K
29:10 | 9:23/mi
Half· 13.11 mi
1:58:01
Rank: #20377 (-86)
20K → Half
6:22 | 9:20/mi
25K· 15.53 mi
2:20:59
Rank: #20458 (-81)
Half → 25K
22:58 | 9:28/mi
30K· 18.64 mi
2:52:01
Rank: #20556 (-98)
25K → 30K
31:02 | 9:59/mi
20M
3:05:50
Rank: #20586 (-30)
30K → 20M
13:49 | 10:10/mi
21M
3:16:46
Rank: #20581 (+5)
20M → 21M
10:56 | 10:56/mi
35K· 21.75 mi
3:24:29
Rank: #20642 (-61)
21M → 35K
7:43 | 10:19/mi
23M
3:36:58
Rank: #20574 (+68)
35K → 23M
12:29 | 9:58/mi
24M
3:46:53
Rank: #20570 (+4)
23M → 24M
9:55 | 9:55/mi
40K· 24.85 mi
3:55:17
Rank: #20525 (+45)
24M → 40K
8:24 | 9:49/mi
25.2M
3:58:54
Rank: #20487 (+38)
40K → 25.2M
3:37 | 10:29/mi
Finish· 26.22 mi
4:08:16
Rank: #20425 (+62)
25.2M → Finish
9:22 | 9:11/mi

The Course

Is this your race?

Claim it — unlock a deeper AI report on this race, free

A personalized Race Performance Report that goes beyond this page — emailed to you, built from your real splits.

Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:58:01
Pace9:00 /mi
2nd Half
Distance13.11 mi
Time2:10:15
Pace9:56 /mi
📊Positive Split: 10.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:26:1726:438:3626:43
8:36
-
10K
6.21 mi11:53:4354:098:4327:26
8:50
+0:14
15K
9.32 mi12:22:031:22:298:5128:20
9:07
+0:17
20K
12.43 mi12:51:131:51:398:5929:10
9:23
+0:16
Half
13.11 mi12:57:351:58:019:006:22
9:20
-0:03
25K
15.53 mi13:20:332:20:599:0522:58
9:28
+0:08
30K
18.64 mi13:51:352:52:019:1431:02
9:59
+0:31
20M
20.00 mi14:05:243:05:509:1713:49
10:10
+0:11
21M
21.00 mi14:16:203:16:469:2210:56
10:56
+0:46
35K
21.75 mi14:24:033:24:299:247:43
10:19
-0:37
23M
23.00 mi14:36:323:36:589:2612:29
9:58
-0:21
24M
24.00 mi14:46:273:46:539:279:55
9:55
-0:03
40K
24.85 mi14:54:513:55:179:288:24
9:49
-0:06
25.2M
25.20 mi14:58:283:58:549:293:37
10:29
+0:40
Finish
26.22 mi15:07:504:08:169:299:22
9:11
-1:18

Checkpoints & Pacing

📈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

8:36 /mi

Average Pace

9:29 /mi

Slowest Pace

10:56 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:30:21

61% of race

Time at Steady Pace

1:01:50

25% of race

Time at Slower Pace

36:05

15% of race

Average Pace: 9:28 /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

Overall Pace Trend

CheckpointDistanceTime of DayTimeAvg PaceSegmentPaceTrendRank
5K
3.11 mi11:26:1726:438:3626:43
8:36
#18246
10K
6.21 mi11:53:4354:098:4327:26
8:50
#19201
15K
9.32 mi12:22:031:22:298:5128:20
9:07
#19868
20K
12.43 mi12:51:131:51:398:5929:10
9:23
#20291
Half
13.11 mi12:57:351:58:019:006:22
9:20
#20377
25K
15.53 mi13:20:332:20:599:0522:58
9:28
#20458
30K
18.64 mi13:51:352:52:019:1431:02
9:59
#20556
20M
20.00 mi14:05:243:05:509:1713:49
10:10
#20586
21M
21.00 mi14:16:203:16:469:2210:56
10:56
#20581
35K
21.75 mi14:24:033:24:299:247:43
10:19
#20642
23M
23.00 mi14:36:323:36:589:2612:29
9:58
#20574
24M
24.00 mi14:46:273:46:539:279:55
9:55
#20570
40K
24.85 mi14:54:513:55:179:288:24
9:49
#20525
25.2M
25.20 mi14:58:283:58:549:293:37
10:29
#20487
Finish
26.22 mi15:07:504:08:169:299:22
9:11
#20425
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi182466710671021022(Top 79%)8246(Top 72%)8246(Top 454%)
10K6.21 mi3.10 mi19201-9557281-5717281-57120092(Top 75%)7749(Top 68%)7749(Top 426%)
15K9.32 mi3.11 mi19868-6677664-3837664-38321022(Top 79%)8246(Top 72%)8246(Top 454%)
20K12.43 mi3.11 mi20291-4237887-2237887-22321221(Top 80%)8353(Top 73%)8353(Top 460%)
Half13.11 mi0.68 mi20377-867929-427929-4221631(Top 81%)8583(Top 75%)8583(Top 472%)
25K15.53 mi2.42 mi20458-817958-297958-2920757(Top 78%)8140(Top 71%)8140(Top 448%)
30K18.64 mi3.11 mi20556-988039-818039-8121005(Top 79%)8345(Top 73%)8345(Top 459%)
20M20.00 mi1.36 mi20586-308068-298068-2920927(Top 79%)8370(Top 73%)8370(Top 461%)
21M21.00 mi1.00 mi20581+58075-78075-720691(Top 78%)8287(Top 73%)8287(Top 456%)
35K21.75 mi0.75 mi20642-618111-368111-3622035(Top 83%)9066(Top 79%)9066(Top 499%)
23M23.00 mi1.25 mi20574+688088+238088+2319917(Top 75%)7908(Top 69%)7908(Top 435%)
24M24.00 mi1.00 mi20570+48102-148102-1420563(Top 77%)8303(Top 73%)8303(Top 457%)
40K24.85 mi0.85 mi20525+458089+138089+1319483(Top 73%)7764(Top 68%)7764(Top 427%)
25.2M25.20 mi0.35 mi20487+388066+238066+2319114(Top 72%)7575(Top 66%)7575(Top 417%)
Finish26.22 mi1.02 mi20425+628042+248042+2418899(Top 71%)7392(Top 65%)7392(Top 407%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 79%
×21stories
+97ft-345ft

Overall

21022

Females

8246

F45-49

8246

5K→10K

3.1 - 6.2 mi

Top 75%
×5stories
+79ft-138ft

Overall

20092

Females

7749

F45-49

7749

10K→15K

6.2 - 9.3 mi

Top 79%
×3stories
+67ft-78ft

Overall

21022

Females

8246

F45-49

8246

15K→20K

9.3 - 12.4 mi

Top 80%
×5stories
+106ft-86ft

Overall

21221

Females

8353

F45-49

8353

20K→Half

12.4 - 13.1 mi

Top 81%
×2stories
+19ft-37ft

Overall

21631

Females

8583

F45-49

8583

Half→25K

13.1 - 15.5 mi

Top 78%
×4stories
+66ft-88ft

Overall

20757

Females

8140

F45-49

8140

25K→30K

15.5 - 18.6 mi

Top 79%
×9stories
+181ft-148ft

Overall

21005

Females

8345

F45-49

8345

30K→20M

18.6 - 20.0 mi

Top 79%
×5stories
+64ft-50ft

Overall

20927

Females

8370

F45-49

8370

20M→21M

20.0 - 21.0 mi

Top 78%
×8stories
+106ft-24ft

Overall

20691

Females

8287

F45-49

8287

21M→35K

21.0 - 21.8 mi

Top 83%
×7stories
+17ft-86ft

Overall

22035

Females

9066

F45-49

9066

35K→23M

21.8 - 23.0 mi

Top 75%
×5stories
+23ft-63ft

Overall

19917

Females

7908

F45-49

7908

23M→24M

23.0 - 24.0 mi

Top 77%
×6stories
+12ft-82ft

Overall

20563

Females

8303

F45-49

8303

24M→40K

24.0 - 24.9 mi

Top 73%
×1story
+6ft-20ft

Overall

19483

Females

7764

F45-49

7764

40K→25.2M

24.9 - 25.2 mi

Top 72%
×1story
+13ft-16ft

Overall

19114

Females

7575

F45-49

7575

25.2M→Finish

25.2 - 26.2 mi

Top 71%
×2stories
+22ft-21ft

Overall

18899

Females

7392

F45-49

7392

Passing Analysis

Category:
Athletes Passed
900
Passed By
3079
Net Change
-2179
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#18246
5K → 10K771032-955#18246#19201
10K → 15K35702-667#19201#19868
15K → 20K71494-423#19868#20291
20K → Half692-86#20291#20377
Half → 25K80161-81#20377#20458
25K → 30K118216-98#20458#20556
30K → 20M6090-30#20556#20586
20M → 21M7671+5#20586#20581
21M → 35K2889-61#20581#20642
35K → 23M9931+68#20642#20574
23M → 24M4945+4#20574#20570
24M → 40K7227+45#20570#20525
40K → 25.2M4911+38#20525#20487
25.2M → Finish8018+62#20487#20425
TOTALS9003079-2179
📊

Passing Visuals

Category:
Loading...

🔥Passing Intensity

Loading...

🔄Passing Circle

Loading...

🌊Position Flow

Loading...

🏃Race Lanes

Loading...

Upload your GPX file

Supports Garmin, Apple Watch, Polar, Suunto, COROS, Strava, and other apps

.gpx files up to 10MB

Export Track Data

Download your race performance as a GPX or TCX file to import into Strava, Garmin Connect, or other fitness apps.

Questions or issues regarding timing data?

If you notice any discrepancies in your timing data or have questions about your results, our support team can help.

Contact Race Support
Share Feedback

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing