Boston Marathon logo
BOSTON MARATHON 2023

Zhihong Duan

Bib: 19692•F

WA

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 26622
Gender (Female)
#0 / 11423
Masters (Masters Women)
#0 / 6539
Top 45%
Division (F40-44)
#0 / 1878
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
25:59
Rank: #16614
Start → 5K
25:59 | 8:22/mi
10K· 6.21 mi
52:06
Rank: #17112 (-498)
5K → 10K
26:07 | 8:24/mi
15K· 9.32 mi
1:18:49
Rank: #17563 (-451)
10K → 15K
26:43 | 8:36/mi
20K· 12.43 mi
1:46:06
Rank: #17811 (-248)
15K → 20K
27:17 | 8:47/mi
Half· 13.11 mi
1:51:57
Rank: #17825 (-14)
20K → Half
5:51 | 8:34/mi
25K· 15.53 mi
2:12:58
Rank: #17682 (+143)
Half → 25K
21:01 | 8:40/mi
30K· 18.64 mi
2:40:57
Rank: #17574 (+108)
25K → 30K
27:59 | 9:00/mi
20M
2:53:16
Rank: #17508 (+66)
30K → 20M
12:19 | 9:04/mi
21M
3:03:21
Rank: #17575 (-67)
20M → 21M
10:05 | 10:05/mi
35K· 21.75 mi
3:09:42
Rank: #17483 (+92)
21M → 35K
6:21 | 8:29/mi
23M
3:20:44
Rank: #17335 (+148)
35K → 23M
11:02 | 8:49/mi
24M
3:29:18
Rank: #17227 (+108)
23M → 24M
8:34 | 8:34/mi
40K· 24.85 mi
3:36:58
Rank: #17165 (+62)
24M → 40K
7:40 | 8:58/mi
25.2M
3:40:16
Rank: #17153 (+12)
40K → 25.2M
3:18 | 9:34/mi
Finish· 26.22 mi
3:49:11
Rank: #17155 (-2)
25.2M → Finish
8:55 | 8:45/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
Time1:51:57
Pace8:32 /mi
2nd Half
Distance13.11 mi
Time1:57:14
Pace8:57 /mi
📊Positive Split: 4.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:19:3525:598:2225:59
8:22
-
10K
6.21 mi11:45:4252:068:2326:07
8:24
+0:02
15K
9.32 mi12:12:251:18:498:2726:43
8:36
+0:12
20K
12.43 mi12:39:421:46:068:3227:17
8:47
+0:11
Half
13.11 mi12:45:331:51:578:325:51
8:34
-0:13
25K
15.53 mi13:06:342:12:588:3421:01
8:40
+0:06
30K
18.64 mi13:34:332:40:578:3827:59
9:00
+0:20
20M
20.00 mi13:46:522:53:168:4012:19
9:04
+0:04
21M
21.00 mi13:56:573:03:218:4410:05
10:05
+1:01
35K
21.75 mi14:03:183:09:428:436:21
8:29
-1:36
23M
23.00 mi14:14:203:20:448:4411:02
8:49
+0:20
24M
24.00 mi14:22:543:29:188:438:34
8:34
-0:15
40K
24.85 mi14:30:343:36:588:447:40
8:58
+0:24
25.2M
25.20 mi14:33:523:40:168:443:18
9:34
+0:36
Finish
26.22 mi14:42:473:49:118:458:55
8:45
-0:49

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

8:22 /mi

Average Pace

8:45 /mi

Slowest Pace

10:05 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

58:27

26% of race

Time at Steady Pace

1:57:03

51% of race

Time at Slower Pace

53:41

23% of race

Average Pace: 8:44 /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 mi11:19:3525:598:2225:59
8:22
#16614
10K
6.21 mi11:45:4252:068:2326:07
8:24
#17112
15K
9.32 mi12:12:251:18:498:2726:43
8:36
#17563
20K
12.43 mi12:39:421:46:068:3227:17
8:47
#17811
Half
13.11 mi12:45:331:51:578:325:51
8:34
#17825
25K
15.53 mi13:06:342:12:588:3421:01
8:40
#17682
30K
18.64 mi13:34:332:40:578:3827:59
9:00
#17574
20M
20.00 mi13:46:522:53:168:4012:19
9:04
#17508
21M
21.00 mi13:56:573:03:218:4410:05
10:05
#17575
35K
21.75 mi14:03:183:09:428:436:21
8:29
#17483
23M
23.00 mi14:14:203:20:448:4411:02
8:49
#17335
24M
24.00 mi14:22:543:29:188:438:34
8:34
#17227
40K
24.85 mi14:30:343:36:588:447:40
8:58
#17165
25.2M
25.20 mi14:33:523:40:168:443:18
9:34
#17153
Finish
26.22 mi14:42:473:49:118:458:55
8:45
#17155
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF40-44Seg. OverallSeg. FemalesSeg. F40-44
5K3.11 mi3.11 mi166145679567918446(Top 69%)6761(Top 59%)6761(Top 360%)
10K6.21 mi3.10 mi17112-4985995-3165995-31617629(Top 66%)6259(Top 55%)6259(Top 333%)
15K9.32 mi3.11 mi17563-4516251-2566251-25618446(Top 69%)6761(Top 59%)6761(Top 360%)
20K12.43 mi3.11 mi17811-2486412-1616412-16118569(Top 70%)6828(Top 60%)6828(Top 364%)
Half13.11 mi0.68 mi17825-146416-46416-418204(Top 68%)6599(Top 58%)6599(Top 351%)
25K15.53 mi2.42 mi17682+1436342+746342+7417218(Top 65%)6127(Top 54%)6127(Top 326%)
30K18.64 mi3.11 mi17574+1086303+396303+3917207(Top 65%)6190(Top 54%)6190(Top 330%)
20M20.00 mi1.36 mi17508+666284+196284+1916875(Top 63%)6079(Top 53%)6079(Top 324%)
21M21.00 mi1.00 mi17575-676343-596343-5918324(Top 69%)6943(Top 61%)6943(Top 370%)
35K21.75 mi0.75 mi17483+926294+496294+4915309(Top 58%)5313(Top 47%)5313(Top 283%)
23M23.00 mi1.25 mi17335+1486217+776217+7715092(Top 57%)5238(Top 46%)5238(Top 279%)
24M24.00 mi1.00 mi17227+1086165+526165+5214912(Top 56%)5189(Top 45%)5189(Top 276%)
40K24.85 mi0.85 mi17165+626152+136152+1315998(Top 60%)5856(Top 51%)5856(Top 312%)
25.2M25.20 mi0.35 mi17153+126150+26150+215584(Top 59%)5645(Top 49%)5645(Top 301%)
Finish26.22 mi1.02 mi17155-26158-86158-816785(Top 63%)6248(Top 55%)6248(Top 333%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 69%
×21stories
+97ft-345ft

Overall

18446

Females

6761

F40-44

6761

5K→10K

3.1 - 6.2 mi

Top 66%
×5stories
+79ft-138ft

Overall

17629

Females

6259

F40-44

6259

10K→15K

6.2 - 9.3 mi

Top 69%
×3stories
+67ft-78ft

Overall

18446

Females

6761

F40-44

6761

15K→20K

9.3 - 12.4 mi

Top 70%
×5stories
+106ft-86ft

Overall

18569

Females

6828

F40-44

6828

20K→Half

12.4 - 13.1 mi

Top 68%
×2stories
+19ft-37ft

Overall

18204

Females

6599

F40-44

6599

Half→25K

13.1 - 15.5 mi

Top 65%
×4stories
+66ft-88ft

Overall

17218

Females

6127

F40-44

6127

25K→30K

15.5 - 18.6 mi

Top 65%
×9stories
+181ft-148ft

Overall

17207

Females

6190

F40-44

6190

30K→20M

18.6 - 20.0 mi

Top 63%
×5stories
+64ft-50ft

Overall

16875

Females

6079

F40-44

6079

20M→21M

20.0 - 21.0 mi

Top 69%
×8stories
+106ft-24ft

Overall

18324

Females

6943

F40-44

6943

21M→35K

21.0 - 21.8 mi

Top 58%
×7stories
+17ft-86ft

Overall

15309

Females

5313

F40-44

5313

35K→23M

21.8 - 23.0 mi

Top 57%
×5stories
+23ft-63ft

Overall

15092

Females

5238

F40-44

5238

23M→24M

23.0 - 24.0 mi

Top 56%
×6stories
+12ft-82ft

Overall

14912

Females

5189

F40-44

5189

24M→40K

24.0 - 24.9 mi

Top 60%
×1story
+6ft-20ft

Overall

15998

Females

5856

F40-44

5856

40K→25.2M

24.9 - 25.2 mi

Top 59%
×1story
+13ft-16ft

Overall

15584

Females

5645

F40-44

5645

25.2M→Finish

25.2 - 26.2 mi

Top 63%
×2stories
+22ft-21ft

Overall

16785

Females

6248

F40-44

6248

Passing Analysis

Category:
Athletes Passed
1518
Passed By
2059
Net Change
-541
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#16614
5K → 10K138636-498#16614#17112
10K → 15K75526-451#17112#17563
15K → 20K101349-248#17563#17811
20K → Half2539-14#17811#17825
Half → 25K19855+143#17825#17682
25K → 30K228120+108#17682#17574
30K → 20M11347+66#17574#17508
20M → 21M68135-67#17508#17575
21M → 35K10311+92#17575#17483
35K → 23M16517+148#17483#17335
23M → 24M12517+108#17335#17227
24M → 40K9129+62#17227#17165
40K → 25.2M3018+12#17165#17153
25.2M → Finish5860-2#17153#17155
TOTALS15182059-541
📊

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