Boston Marathon logo
BOSTON MARATHON 2023

Jianhui Shen

Bib: 3925•M

NJ

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 26622
Top 18%
Gender (Male)
#0 / 15176
Top 29%
Division (M18-39)
#0 / 5285
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
21:34
Rank: #5867
Start → 5K
21:34 | 6:56/mi
10K· 6.21 mi
43:24
Rank: #6413 (-546)
5K → 10K
21:50 | 7:02/mi
15K· 9.32 mi
1:05:21
Rank: #6565 (-152)
10K → 15K
21:57 | 7:04/mi
20K· 12.43 mi
1:27:01
Rank: #6359 (+206)
15K → 20K
21:40 | 6:58/mi
Half· 13.11 mi
1:31:41
Rank: #6324 (+35)
20K → Half
4:40 | 6:50/mi
25K· 15.53 mi
1:48:28
Rank: #6095 (+229)
Half → 25K
16:47 | 6:55/mi
30K· 18.64 mi
2:10:24
Rank: #5771 (+324)
25K → 30K
21:56 | 7:04/mi
20M
2:20:04
Rank: #5666 (+105)
30K → 20M
9:40 | 7:07/mi
21M
2:27:29
Rank: #5556 (+110)
20M → 21M
7:25 | 7:25/mi
35K· 21.75 mi
2:32:42
Rank: #5510 (+46)
21M → 35K
5:13 | 6:58/mi
23M
2:41:32
Rank: #5356 (+154)
35K → 23M
8:50 | 7:03/mi
24M
2:48:17
Rank: #5216 (+140)
23M → 24M
6:45 | 6:45/mi
40K· 24.85 mi
2:53:58
Rank: #5054 (+162)
24M → 40K
5:41 | 6:39/mi
25.2M
2:56:22
Rank: #4983 (+71)
40K → 25.2M
2:24 | 6:58/mi
Finish· 26.22 mi
3:03:04
Rank: #4848 (+135)
25.2M → Finish
6:42 | 6:34/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 Half⚖️ Balanced
Distance13.11 mi
Time1:31:41
Pace7:00 /mi
2nd Half⚖️ Balanced
Distance13.11 mi
Time1:31:23
Pace6:58 /mi
📊Even Split: Consistent pacing between halves

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:24:0821:346:5621:34
6:56
-
10K
6.21 mi10:45:5843:246:5921:50
7:02
+0:06
15K
9.32 mi11:07:551:05:217:0121:57
7:04
+0:02
20K
12.43 mi11:29:351:27:017:0021:40
6:58
-0:06
Half
13.11 mi11:34:151:31:417:004:40
6:50
-0:08
25K
15.53 mi11:51:021:48:286:5916:47
6:55
+0:05
30K
18.64 mi12:12:582:10:247:0021:56
7:04
+0:09
20M
20.00 mi12:22:382:20:047:009:40
7:07
+0:03
21M
21.00 mi12:30:032:27:297:017:25
7:25
+0:18
35K
21.75 mi12:35:162:32:427:015:13
6:58
-0:27
23M
23.00 mi12:44:062:41:327:018:50
7:03
+0:05
24M
24.00 mi12:50:512:48:177:016:45
6:45
-0:18
40K
24.85 mi12:56:322:53:587:005:41
6:39
-0:06
25.2M
25.20 mi12:58:562:56:227:002:24
6:58
+0:19
Finish
26.22 mi13:05:383:03:046:596:42
6:34
-0:24

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

6:34 /mi

Average Pace

6:59 /mi

Slowest Pace

7:25 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:55:39

96% of race

Time at Steady Pace

7:25

4% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:59 /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 mi10:24:0821:346:5621:34
6:56
#5867
10K
6.21 mi10:45:5843:246:5921:50
7:02
#6413
15K
9.32 mi11:07:551:05:217:0121:57
7:04
#6565
20K
12.43 mi11:29:351:27:017:0021:40
6:58
#6359
Half
13.11 mi11:34:151:31:417:004:40
6:50
#6324
25K
15.53 mi11:51:021:48:286:5916:47
6:55
#6095
30K
18.64 mi12:12:582:10:247:0021:56
7:04
#5771
20M
20.00 mi12:22:382:20:047:009:40
7:07
#5666
21M
21.00 mi12:30:032:27:297:017:25
7:25
#5556
35K
21.75 mi12:35:162:32:427:015:13
6:58
#5510
23M
23.00 mi12:44:062:41:327:018:50
7:03
#5356
24M
24.00 mi12:50:512:48:177:016:45
6:45
#5216
40K
24.85 mi12:56:322:53:587:005:41
6:39
#5054
25.2M
25.20 mi12:58:562:56:227:002:24
6:58
#4983
Finish
26.22 mi13:05:383:03:046:596:42
6:34
#4848
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi5867537953796925(Top 26%)6187(Top 41%)6187(Top 117%)
10K6.21 mi3.10 mi6413-5465799-4205799-4206990(Top 26%)6230(Top 41%)6230(Top 118%)
15K9.32 mi3.11 mi6565-1525924-1255924-1256925(Top 26%)6187(Top 41%)6187(Top 117%)
20K12.43 mi3.11 mi6359+2065751+1735751+1735811(Top 22%)5320(Top 35%)5320(Top 101%)
Half13.11 mi0.68 mi6324+355724+275724+275547(Top 21%)5107(Top 34%)5107(Top 97%)
25K15.53 mi2.42 mi6095+2295553+1715553+1715097(Top 19%)4707(Top 31%)4707(Top 89%)
30K18.64 mi3.11 mi5771+3245289+2645289+2644719(Top 18%)4356(Top 29%)4356(Top 82%)
20M20.00 mi1.36 mi5666+1055194+955194+954676(Top 18%)4281(Top 28%)4281(Top 81%)
21M21.00 mi1.00 mi5556+1105099+955099+954202(Top 16%)3854(Top 25%)3854(Top 73%)
35K21.75 mi0.75 mi5510+465057+425057+425158(Top 19%)4609(Top 30%)4609(Top 87%)
23M23.00 mi1.25 mi5356+1544914+1434914+1434070(Top 15%)3746(Top 25%)3746(Top 71%)
24M24.00 mi1.00 mi5216+1404785+1294785+1293400(Top 13%)3137(Top 21%)3137(Top 59%)
40K24.85 mi0.85 mi5054+1624649+1364649+1362132(Top 8%)1996(Top 13%)1996(Top 38%)
25.2M25.20 mi0.35 mi4983+714589+604589+601679(Top 6%)1585(Top 10%)1585(Top 30%)
Finish26.22 mi1.02 mi4848+1354470+1194470+1192871(Top 11%)2608(Top 17%)2608(Top 49%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 26%
×21stories
+97ft-345ft

Overall

6925

Males

6187

M18-39

6187

5K→10K

3.1 - 6.2 mi

Top 26%
×5stories
+79ft-138ft

Overall

6990

Males

6230

M18-39

6230

10K→15K

6.2 - 9.3 mi

Top 26%
×3stories
+67ft-78ft

Overall

6925

Males

6187

M18-39

6187

15K→20K

9.3 - 12.4 mi

Top 22%
×5stories
+106ft-86ft

Overall

5811

Males

5320

M18-39

5320

20K→Half

12.4 - 13.1 mi

Top 21%
×2stories
+19ft-37ft

Overall

5547

Males

5107

M18-39

5107

Half→25K

13.1 - 15.5 mi

Top 19%
×4stories
+66ft-88ft

Overall

5097

Males

4707

M18-39

4707

25K→30K

15.5 - 18.6 mi

Top 18%
×9stories
+181ft-148ft

Overall

4719

Males

4356

M18-39

4356

30K→20M

18.6 - 20.0 mi

Top 18%
×5stories
+64ft-50ft

Overall

4676

Males

4281

M18-39

4281

20M→21M

20.0 - 21.0 mi

Top 16%
×8stories
+106ft-24ft

Overall

4202

Males

3854

M18-39

3854

21M→35K

21.0 - 21.8 mi

Top 19%
×7stories
+17ft-86ft

Overall

5158

Males

4609

M18-39

4609

35K→23M

21.8 - 23.0 mi

Top 15%
×5stories
+23ft-63ft

Overall

4070

Males

3746

M18-39

3746

23M→24M

23.0 - 24.0 mi

Top 13%
×6stories
+12ft-82ft

Overall

3400

Males

3137

M18-39

3137

24M→40K

24.0 - 24.9 mi

Top 8%
×1story
+6ft-20ft

Overall

2132

Males

1996

M18-39

1996

40K→25.2M

24.9 - 25.2 mi

Top 6%
×1story
+13ft-16ft

Overall

1679

Males

1585

M18-39

1585

25.2M→Finish

25.2 - 26.2 mi

Top 11%
×2stories
+22ft-21ft

Overall

2871

Males

2608

M18-39

2608

Passing Analysis

Category:
Athletes Passed
1904
Passed By
885
Net Change
+1019
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#5867
5K → 10K40586-546#5867#6413
10K → 15K65217-152#6413#6565
15K → 20K22519+206#6565#6359
20K → Half394+35#6359#6324
Half → 25K2378+229#6324#6095
25K → 30K3306+324#6095#5771
30K → 20M11712+105#5771#5666
20M → 21M12111+110#5666#5556
21M → 35K5812+46#5556#5510
35K → 23M1595+154#5510#5356
23M → 24M1422+140#5356#5216
24M → 40K1653+162#5216#5054
40K → 25.2M710+71#5054#4983
25.2M → Finish1350+135#4983#4848
TOTALS1904885+1019
📊

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