Boston Marathon logo
BOSTON MARATHON 2023

Zhihua Shao

Bib: 31743•M

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 26622
Top 38%
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Top 42%
Division (M40-44)
#0 / 2241
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent
Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
5K· 3.11 mi
7:52/mi
24:27
↑ 97↓ 3451.5%
10K· 6.21 mi
7:04/mi
46:25
↑ 79↓ 1380.4%
15K· 9.32 mi
7:24/mi
1:09:24
↑ 67↓ 78
20K· 12.43 mi
7:36/mi
1:33:01
↑ 106↓ 860.1%
Half· 13.11 mi
7:18/mi
1:38:00
↑ 19↓ 370.5%
25K· 15.53 mi
7:30/mi
1:56:12
↑ 66↓ 880.2%
30K· 18.64 mi
7:54/mi
2:20:45
↑ 181↓ 1480.2%
20M
8:08/mi
2:31:48
↑ 64↓ 500.2%
21M
8:38/mi
2:40:26
↑ 106↓ 241.6%
35K· 21.75 mi
7:42/mi
2:46:12
↑ 17↓ 861.7%
23M
8:15/mi
2:56:32
↑ 23↓ 630.6%
24M
8:02/mi
3:04:34
↓ 821.3%
40K· 24.85 mi
8:18/mi
3:11:40
↓ 200.3%
25.2M
8:54/mi
3:14:44
↑ 13↓ 160.2%
Finish· 26.22 mi
8:00/mi
3:22:53
↑ 22↓ 21

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
Time1:38:00
Pace7:29 /mi
2nd Half
Distance13.11 mi
Time1:44:53
Pace8:00 /mi
📊Positive Split: 7.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:44:0324:277:5224:27
7:52
-
10K
6.21 mi12:06:0146:257:2821:58
7:04
-0:48
15K
9.32 mi12:29:001:09:247:2722:59
7:24
+0:20
20K
12.43 mi12:52:371:33:017:2923:37
7:36
+0:12
Half
13.11 mi12:57:361:38:007:294:59
7:18
-0:18
25K
15.53 mi13:15:481:56:127:2918:12
7:30
+0:12
30K
18.64 mi13:40:212:20:457:3324:33
7:54
+0:24
20M
20.00 mi13:51:242:31:487:3511:03
8:08
+0:14
21M
21.00 mi14:00:022:40:267:388:38
8:38
+0:30
35K
21.75 mi14:05:482:46:127:395:46
7:42
-0:56
23M
23.00 mi14:16:082:56:327:4110:20
8:15
+0:33
24M
24.00 mi14:24:103:04:347:418:02
8:02
-0:13
40K
24.85 mi14:31:163:11:407:437:06
8:18
+0:16
25.2M
25.20 mi14:34:203:14:447:443:04
8:54
+0:36
Finish
26.22 mi14:42:293:22:537:458:09
8:00
-0:54

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

7:04 /mi

Average Pace

7:45 /mi

Slowest Pace

8:54 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:31:45

45% of race

Time at Steady Pace

1:22:00

40% of race

Time at Slower Pace

29:08

14% of race

Average Pace: 7:44 /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 mi11:44:0324:277:5224:27
7:52
#12978
10K
6.21 mi12:06:0146:257:2821:58
7:04
#9747
15K
9.32 mi12:29:001:09:247:2722:59
7:24
#9577
20K
12.43 mi12:52:371:33:017:2923:37
7:36
#9686
Half
13.11 mi12:57:361:38:007:294:59
7:18
#9627
25K
15.53 mi13:15:481:56:127:2918:12
7:30
#9481
30K
18.64 mi13:40:212:20:457:3324:33
7:54
#9590
20M
20.00 mi13:51:242:31:487:3511:03
8:08
#9666
21M
21.00 mi14:00:022:40:267:388:38
8:38
#9732
35K
21.75 mi14:05:482:46:127:395:46
7:42
#9729
23M
23.00 mi14:16:082:56:327:4110:20
8:15
#9804
24M
24.00 mi14:24:103:04:347:418:02
8:02
#9858
40K
24.85 mi14:31:163:11:407:437:06
8:18
#9923
25.2M
25.20 mi14:34:203:14:447:443:04
8:54
#9946
Finish
26.22 mi14:42:293:22:537:458:09
8:00
#10015
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi12978953195319305(Top 35%)7741(Top 51%)7741(Top 345%)
10K6.21 mi3.10 mi9747+32318012+15198012+15197254(Top 27%)6418(Top 42%)6418(Top 286%)
15K9.32 mi3.11 mi9577+1707916+967916+969305(Top 35%)7741(Top 51%)7741(Top 345%)
20K12.43 mi3.11 mi9686-1097975-597975-5910094(Top 38%)8120(Top 54%)8120(Top 362%)
Half13.11 mi0.68 mi9627+597942+337942+338640(Top 32%)7304(Top 48%)7304(Top 326%)
25K15.53 mi2.42 mi9481+1467833+1097833+1098837(Top 33%)7338(Top 48%)7338(Top 327%)
30K18.64 mi3.11 mi9590-1097864-317864-3110143(Top 38%)7898(Top 52%)7898(Top 352%)
20M20.00 mi1.36 mi9666-767875-117875-1111209(Top 42%)8357(Top 55%)8357(Top 373%)
21M21.00 mi1.00 mi9732-667901-267901-2611229(Top 42%)8219(Top 54%)8219(Top 367%)
35K21.75 mi0.75 mi9729+37878+237878+239964(Top 37%)7618(Top 50%)7618(Top 340%)
23M23.00 mi1.25 mi9804-757882-47882-411526(Top 43%)8241(Top 54%)8241(Top 368%)
24M24.00 mi1.00 mi9858-547883-17883-111445(Top 43%)8121(Top 54%)8121(Top 362%)
40K24.85 mi0.85 mi9923-657884-17884-112021(Top 45%)8318(Top 55%)8318(Top 371%)
25.2M25.20 mi0.35 mi9946-237879+57879+511807(Top 44%)8150(Top 54%)8150(Top 364%)
Finish26.22 mi1.02 mi10015-697900-217900-2112086(Top 45%)8321(Top 55%)8321(Top 371%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 35%
×21story building
+97ft-345ft

Overall

9305

Males

7741

M40-44

7741

5K→10K

3.1 - 6.2 mi

Top 27%
×5story building
+79ft-138ft

Overall

7254

Males

6418

M40-44

6418

10K→15K

6.2 - 9.3 mi

Top 35%
×3story building
+67ft-78ft

Overall

9305

Males

7741

M40-44

7741

15K→20K

9.3 - 12.4 mi

Top 38%
×5story building
+106ft-86ft

Overall

10094

Males

8120

M40-44

8120

20K→Half

12.4 - 13.1 mi

Top 32%
×2story building
+19ft-37ft

Overall

8640

Males

7304

M40-44

7304

Half→25K

13.1 - 15.5 mi

Top 33%
×4story building
+66ft-88ft

Overall

8837

Males

7338

M40-44

7338

25K→30K

15.5 - 18.6 mi

Top 38%
×9story building
+181ft-148ft

Overall

10143

Males

7898

M40-44

7898

30K→20M

18.6 - 20.0 mi

Top 42%
×5story building
+64ft-50ft

Overall

11209

Males

8357

M40-44

8357

20M→21M

20.0 - 21.0 mi

Top 42%
×8story building
+106ft-24ft

Overall

11229

Males

8219

M40-44

8219

21M→35K

21.0 - 21.8 mi

Top 37%
×7story building
+17ft-86ft

Overall

9964

Males

7618

M40-44

7618

35K→23M

21.8 - 23.0 mi

Top 43%
×5story building
+23ft-63ft

Overall

11526

Males

8241

M40-44

8241

23M→24M

23.0 - 24.0 mi

Top 43%
×6story building
+12ft-82ft

Overall

11445

Males

8121

M40-44

8121

24M→40K

24.0 - 24.9 mi

Top 45%
×1story
+6ft-20ft

Overall

12021

Males

8318

M40-44

8318

40K→25.2M

24.9 - 25.2 mi

Top 44%
×1story
+13ft-16ft

Overall

11807

Males

8150

M40-44

8150

25.2M→Finish

25.2 - 26.2 mi

Top 45%
×2story building
+22ft-21ft

Overall

12086

Males

8321

M40-44

8321

Passing Analysis

Category:
Athletes Passed
4411*
Passed By
1446
Net Change
+2963
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#12978
5K → 10K3235*4+3231#12978#9747
10K → 15K26494+170#9747#9577
15K → 20K111220-109#9577#9686
20K → Half601+59#9686#9627
Half → 25K19549+146#9627#9481
25K → 30K143*252-109#9481#9590
30K → 20M65141-76#9590#9666
20M → 21M49115-66#9666#9732
21M → 35K4946+3#9732#9729
35K → 23M72147-75#9729#9804
23M → 24M48101-54#9804#9858
24M → 40K51116-65#9858#9923
40K → 25.2M2144-23#9923#9946
25.2M → Finish48116-69#9946#10015
TOTALS4411*1446+2963

* Includes athletes who did not complete a segment (DNF/DNQ).

📊

Passing Visuals

Category:
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

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing