Boston Marathon logo
BOSTON MARATHON 2023

Jiang Zhang

Bib: 14492•M

NY

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 26622
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Division (M50-54)
#0 / 2052
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
8:16/mi
25:41
↑ 97↓ 3451.5%
10K· 6.21 mi
8:27/mi
51:57
↑ 79↓ 1380.4%
15K· 9.32 mi
8:25/mi
1:18:05
↑ 67↓ 78
20K· 12.43 mi
8:32/mi
1:44:35
↑ 106↓ 860.1%
Half· 13.11 mi
8:39/mi
1:50:29
↑ 19↓ 370.5%
25K· 15.53 mi
8:36/mi
2:11:19
↑ 66↓ 880.2%
30K· 18.64 mi
8:54/mi
2:38:58
↑ 181↓ 1480.2%
20M
8:34/mi
2:50:36
↑ 64↓ 500.2%
21M
8:41/mi
2:59:17
↑ 106↓ 241.6%
35K· 21.75 mi
7:55/mi
3:05:12
↑ 17↓ 861.7%
23M
8:06/mi
3:15:21
↑ 23↓ 630.6%
24M
7:50/mi
3:23:11
↓ 821.3%
40K· 24.85 mi
8:12/mi
3:30:12
↓ 200.3%
25.2M
9:23/mi
3:33:26
↑ 13↓ 160.2%
Finish· 26.22 mi
9:14/mi
3:42:51
↑ 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
Time1:50:29
Pace8:26 /mi
2nd Half
Distance13.11 mi
Time1:52:22
Pace8:34 /mi
📊Positive Split: 1.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:25:4225:418:1625:41
8:16
-
10K
6.21 mi11:51:5851:578:2226:16
8:27
+0:11
15K
9.32 mi12:18:061:18:058:2326:08
8:25
-0:02
20K
12.43 mi12:44:361:44:358:2526:30
8:32
+0:07
Half
13.11 mi12:50:301:50:298:265:54
8:39
+0:07
25K
15.53 mi13:11:202:11:198:2720:50
8:36
-0:03
30K
18.64 mi13:38:592:38:588:3227:39
8:54
+0:18
20M
20.00 mi13:50:372:50:368:3211:38
8:34
-0:20
21M
21.00 mi13:59:182:59:178:328:41
8:41
+0:07
35K
21.75 mi14:05:133:05:128:315:55
7:55
-0:46
23M
23.00 mi14:15:223:15:218:3010:09
8:06
+0:11
24M
24.00 mi14:23:123:23:118:287:50
7:50
-0:16
40K
24.85 mi14:30:133:30:128:277:01
8:12
+0:22
25.2M
25.20 mi14:33:273:33:268:283:14
9:23
+1:11
Finish
26.22 mi14:42:523:42:518:309:25
9:14
-0:09

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

7:50 /mi

Average Pace

8:30 /mi

Slowest Pace

9:23 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:47:58

75% of race

Time at Steady Pace

51:39

23% of race

Time at Slower Pace

3:14

1% of race

Average Pace: 8:30 /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 mi11:25:4225:418:1625:41
8:16
#15917
10K
6.21 mi11:51:5851:578:2226:16
8:27
#16919
15K
9.32 mi12:18:061:18:058:2326:08
8:25
#17049
20K
12.43 mi12:44:361:44:358:2526:30
8:32
#17040
Half
13.11 mi12:50:301:50:298:265:54
8:39
#17136
25K
15.53 mi13:11:202:11:198:2720:50
8:36
#17055
30K
18.64 mi13:38:592:38:588:3227:39
8:54
#16934
20M
20.00 mi13:50:372:50:368:3211:38
8:34
#16717
21M
21.00 mi13:59:182:59:178:328:41
8:41
#16410
35K
21.75 mi14:05:133:05:128:315:55
7:55
#16249
23M
23.00 mi14:15:223:15:218:3010:09
8:06
#15911
24M
24.00 mi14:23:123:23:118:287:50
7:50
#15641
40K
24.85 mi14:30:133:30:128:277:01
8:12
#15498
25.2M
25.20 mi14:33:273:33:268:283:14
9:23
#15474
Finish
26.22 mi14:42:523:42:518:309:25
9:14
#15653
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi3.11 mi15917106721067217212(Top 65%)11139(Top 73%)11139(Top 543%)
10K6.21 mi3.10 mi16919-100211040-36811040-36817942(Top 67%)11474(Top 76%)11474(Top 559%)
15K9.32 mi3.11 mi17049-13011093-5311093-5317212(Top 65%)11139(Top 73%)11139(Top 543%)
20K12.43 mi3.11 mi17040+911067+2611067+2617025(Top 64%)11066(Top 73%)11066(Top 539%)
Half13.11 mi0.68 mi17136-9611108-4111108-4118545(Top 70%)11706(Top 77%)11706(Top 570%)
25K15.53 mi2.42 mi17055+8111058+5011058+5016756(Top 63%)10861(Top 72%)10861(Top 529%)
30K18.64 mi3.11 mi16934+12110991+6710991+6716640(Top 63%)10759(Top 71%)10759(Top 524%)
20M20.00 mi1.36 mi16717+21710877+11410877+11413996(Top 53%)9578(Top 63%)9578(Top 467%)
21M21.00 mi1.00 mi16410+30710735+14210735+14211559(Top 43%)8378(Top 55%)8378(Top 408%)
35K21.75 mi0.75 mi16249+16110653+8210653+8211453(Top 43%)8343(Top 55%)8343(Top 407%)
23M23.00 mi1.25 mi15911+33810483+17010483+17010517(Top 40%)7739(Top 51%)7739(Top 377%)
24M24.00 mi1.00 mi15641+27010357+12610357+12610037(Top 38%)7418(Top 49%)7418(Top 362%)
40K24.85 mi0.85 mi15498+14310288+6910288+6911398(Top 43%)8032(Top 53%)8032(Top 391%)
25.2M25.20 mi0.35 mi15474+2410277+1110277+1114526(Top 55%)9482(Top 62%)9482(Top 462%)
Finish26.22 mi1.02 mi15653-17910348-7110348-7119086(Top 72%)11574(Top 76%)11574(Top 564%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 65%
×21story building
+97ft-345ft

Overall

17212

Males

11139

M50-54

11139

5K→10K

3.1 - 6.2 mi

Top 67%
×5story building
+79ft-138ft

Overall

17942

Males

11474

M50-54

11474

10K→15K

6.2 - 9.3 mi

Top 65%
×3story building
+67ft-78ft

Overall

17212

Males

11139

M50-54

11139

15K→20K

9.3 - 12.4 mi

Top 64%
×5story building
+106ft-86ft

Overall

17025

Males

11066

M50-54

11066

20K→Half

12.4 - 13.1 mi

Top 70%
×2story building
+19ft-37ft

Overall

18545

Males

11706

M50-54

11706

Half→25K

13.1 - 15.5 mi

Top 63%
×4story building
+66ft-88ft

Overall

16756

Males

10861

M50-54

10861

25K→30K

15.5 - 18.6 mi

Top 63%
×9story building
+181ft-148ft

Overall

16640

Males

10759

M50-54

10759

30K→20M

18.6 - 20.0 mi

Top 53%
×5story building
+64ft-50ft

Overall

13996

Males

9578

M50-54

9578

20M→21M

20.0 - 21.0 mi

Top 43%
×8story building
+106ft-24ft

Overall

11559

Males

8378

M50-54

8378

21M→35K

21.0 - 21.8 mi

Top 43%
×7story building
+17ft-86ft

Overall

11453

Males

8343

M50-54

8343

35K→23M

21.8 - 23.0 mi

Top 40%
×5story building
+23ft-63ft

Overall

10517

Males

7739

M50-54

7739

23M→24M

23.0 - 24.0 mi

Top 38%
×6story building
+12ft-82ft

Overall

10037

Males

7418

M50-54

7418

24M→40K

24.0 - 24.9 mi

Top 43%
×1story
+6ft-20ft

Overall

11398

Males

8032

M50-54

8032

40K→25.2M

24.9 - 25.2 mi

Top 55%
×1story
+13ft-16ft

Overall

14526

Males

9482

M50-54

9482

25.2M→Finish

25.2 - 26.2 mi

Top 72%
×2story building
+22ft-21ft

Overall

19086

Males

11574

M50-54

11574

Passing Analysis

Category:
Athletes Passed
2297
Passed By
2033
Net Change
+264
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#15917
5K → 10K471049-1002#15917#16919
10K → 15K144274-130#16919#17049
15K → 20K190181+9#17049#17040
20K → Half6102-96#17040#17136
Half → 25K16180+81#17136#17055
25K → 30K229108+121#17055#16934
30K → 20M2225+217#16934#16717
20M → 21M3081+307#16717#16410
21M → 35K1621+161#16410#16249
35K → 23M3424+338#16249#15911
23M → 24M2722+270#15911#15641
24M → 40K1485+143#15641#15498
40K → 25.2M4319+24#15498#15474
25.2M → Finish23202-179#15474#15653
TOTALS22972033+264
📊

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