Boston Marathon logo
BOSTON MARATHON 2024

Changchun Shen

Bib: 28699•M

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 25550
Gender (Male)
#0 / 14578
Division (M18-39)
#0 / 4849
Race Day Weather
55°/45°F
scattered clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
23:27
Rank: #11158
Start → 5K
23:27 | 7:33/mi
10K· 6.21 mi
46:17
Rank: #10024 (+1134)
5K → 10K
22:50 | 7:21/mi
15K· 9.32 mi
1:09:41
Rank: #9959 (+65)
10K → 15K
23:24 | 7:32/mi
20K· 12.43 mi
1:33:34
Rank: #9856 (+103)
15K → 20K
23:53 | 7:41/mi
Half· 13.11 mi
1:38:46
Rank: #9846 (+10)
20K → Half
5:12 | 7:37/mi
25K· 15.53 mi
1:58:15
Rank: #9878 (-32)
Half → 25K
19:29 | 8:02/mi
30K· 18.64 mi
2:24:31
Rank: #9932 (-54)
25K → 30K
26:16 | 8:27/mi
20M
2:36:37
Rank: #9996 (-64)
30K → 20M
12:06 | 8:54/mi
21M
2:46:29
Rank: #10134 (-138)
20M → 21M
9:52 | 9:52/mi
35K· 21.75 mi
2:53:43
Rank: #10398 (-264)
21M → 35K
7:14 | 9:40/mi
23M
3:08:25
Rank: #11402 (-1004)
35K → 23M
14:42 | 11:44/mi
24M
3:18:43
Rank: #11786 (-384)
23M → 24M
10:18 | 10:18/mi
40K· 24.85 mi
3:29:11
Rank: #12362 (-576)
24M → 40K
10:28 | 12:14/mi
25.2M
3:33:22
Rank: #12498 (-136)
40K → 25.2M
4:11 | 12:08/mi
Finish· 26.22 mi
3:44:04
Rank: #12914 (-416)
25.2M → Finish
10:42 | 10:30/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
Time1:38:46
Pace7:32 /mi
2nd Half
Distance13.11 mi
Time2:05:18
Pace9:33 /mi
📊Positive Split: 26.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:43:0523:277:3323:27
7:33
-
10K
6.21 mi12:05:5546:177:2722:50
7:21
-0:12
15K
9.32 mi12:29:191:09:417:2923:24
7:32
+0:11
20K
12.43 mi12:53:121:33:347:3223:53
7:41
+0:09
Half
13.11 mi12:58:241:38:467:325:12
7:37
-0:04
25K
15.53 mi13:17:531:58:157:3719:29
8:02
+0:25
30K
18.64 mi13:44:092:24:317:4526:16
8:27
+0:25
20M
20.00 mi13:56:152:36:377:5012:06
8:54
+0:27
21M
21.00 mi14:06:072:46:297:569:52
9:52
+0:58
35K
21.75 mi14:13:212:53:437:597:14
9:40
-0:12
23M
23.00 mi14:28:033:08:258:1214:42
11:44
+2:04
24M
24.00 mi14:38:213:18:438:1710:18
10:18
-1:26
40K
24.85 mi14:48:493:29:118:2510:28
12:14
+1:56
25.2M
25.20 mi14:53:003:33:228:284:11
12:08
-0:06
Finish
26.22 mi15:03:423:44:048:3310:42
10:30
-1:38

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

7:21 /mi

Average Pace

8:33 /mi

Slowest Pace

12:14 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:58:15

53% of race

Time at Steady Pace

45:36

20% of race

Time at Slower Pace

1:00:13

27% of race

Average Pace: 8:33 /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 mi11:43:0523:277:3323:27
7:33
#11158
10K
6.21 mi12:05:5546:177:2722:50
7:21
#10024
15K
9.32 mi12:29:191:09:417:2923:24
7:32
#9959
20K
12.43 mi12:53:121:33:347:3223:53
7:41
#9856
Half
13.11 mi12:58:241:38:467:325:12
7:37
#9846
25K
15.53 mi13:17:531:58:157:3719:29
8:02
#9878
30K
18.64 mi13:44:092:24:317:4526:16
8:27
#9932
20M
20.00 mi13:56:152:36:377:5012:06
8:54
#9996
21M
21.00 mi14:06:072:46:297:569:52
9:52
#10134
35K
21.75 mi14:13:212:53:437:597:14
9:40
#10398
23M
23.00 mi14:28:033:08:258:1214:42
11:44
#11402
24M
24.00 mi14:38:213:18:438:1710:18
10:18
#11786
40K
24.85 mi14:48:493:29:118:2510:28
12:14
#12362
25.2M
25.20 mi14:53:003:33:228:284:11
12:08
#12498
Finish
26.22 mi15:03:423:44:048:3310:42
10:30
#12914
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi11158848484849927(Top 39%)7766(Top 53%)7766(Top 160%)
10K6.21 mi3.10 mi10024+11347945+5397945+5399048(Top 35%)7362(Top 51%)7362(Top 152%)
15K9.32 mi3.11 mi9959+657865+807865+809927(Top 39%)7766(Top 53%)7766(Top 160%)
20K12.43 mi3.11 mi9856+1037763+1027763+1029656(Top 38%)7485(Top 51%)7485(Top 154%)
Half13.11 mi0.68 mi9846+107744+197744+199985(Top 39%)7682(Top 53%)7682(Top 158%)
25K15.53 mi2.42 mi9878-327692+527692+5210406(Top 41%)7695(Top 53%)7695(Top 159%)
30K18.64 mi3.11 mi9932-547627+657627+6510419(Top 41%)7500(Top 51%)7500(Top 155%)
20M20.00 mi1.36 mi9996-647600+277600+2711612(Top 45%)7764(Top 53%)7764(Top 160%)
21M21.00 mi1.00 mi10134-1387615-157615-1512414(Top 49%)7908(Top 54%)7908(Top 163%)
35K21.75 mi0.75 mi10398-2647712-977712-9716053(Top 63%)9633(Top 66%)9633(Top 199%)
23M23.00 mi1.25 mi11402-10048127-4158127-41520181(Top 79%)11651(Top 80%)11651(Top 240%)
24M24.00 mi1.00 mi11786-3848260-1338260-13317253(Top 68%)10126(Top 69%)10126(Top 209%)
40K24.85 mi0.85 mi12362-5768461-2018461-20120882(Top 82%)11896(Top 82%)11896(Top 245%)
25.2M25.20 mi0.35 mi12498-1368507-468507-4617600(Top 69%)10213(Top 70%)10213(Top 211%)
Finish26.22 mi1.02 mi12914-4168649-1428649-14220002(Top 78%)11477(Top 79%)11477(Top 237%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 39%
×21stories
+97ft-345ft

Overall

9927

Males

7766

M18-39

7766

5K→10K

3.1 - 6.2 mi

Top 35%
×5stories
+79ft-138ft

Overall

9048

Males

7362

M18-39

7362

10K→15K

6.2 - 9.3 mi

Top 39%
×3stories
+67ft-78ft

Overall

9927

Males

7766

M18-39

7766

15K→20K

9.3 - 12.4 mi

Top 38%
×5stories
+106ft-86ft

Overall

9656

Males

7485

M18-39

7485

20K→Half

12.4 - 13.1 mi

Top 39%
×2stories
+19ft-37ft

Overall

9985

Males

7682

M18-39

7682

Half→25K

13.1 - 15.5 mi

Top 41%
×4stories
+66ft-88ft

Overall

10406

Males

7695

M18-39

7695

25K→30K

15.5 - 18.6 mi

Top 41%
×9stories
+181ft-148ft

Overall

10419

Males

7500

M18-39

7500

30K→20M

18.6 - 20.0 mi

Top 45%
×5stories
+64ft-50ft

Overall

11612

Males

7764

M18-39

7764

20M→21M

20.0 - 21.0 mi

Top 49%
×8stories
+106ft-24ft

Overall

12414

Males

7908

M18-39

7908

21M→35K

21.0 - 21.8 mi

Top 63%
×7stories
+17ft-86ft

Overall

16053

Males

9633

M18-39

9633

35K→23M

21.8 - 23.0 mi

Top 79%
×5stories
+23ft-63ft

Overall

20181

Males

11651

M18-39

11651

23M→24M

23.0 - 24.0 mi

Top 68%
×6stories
+12ft-82ft

Overall

17253

Males

10126

M18-39

10126

24M→40K

24.0 - 24.9 mi

Top 82%
×1story
+6ft-20ft

Overall

20882

Males

11896

M18-39

11896

40K→25.2M

24.9 - 25.2 mi

Top 69%
×1story
+13ft-16ft

Overall

17600

Males

10213

M18-39

10213

25.2M→Finish

25.2 - 26.2 mi

Top 78%
×2stories
+22ft-21ft

Overall

20002

Males

11477

M18-39

11477

Passing Analysis

Category:
Athletes Passed
2517*
Passed By
4267
Net Change
-1756
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#11158
5K → 10K1156*22+1134#11158#10024
10K → 15K248*183+65#10024#9959
15K → 20K258154+103#9959#9856
20K → Half4131+10#9856#9846
Half → 25K205236-32#9846#9878
25K → 30K261314-54#9878#9932
30K → 20M120183-64#9932#9996
20M → 21M93229-138#9996#10134
21M → 35K27291-264#10134#10398
35K → 23M231027-1004#10398#11402
23M → 24M30414-384#11402#11786
24M → 40K15591-576#11786#12362
40K → 25.2M18154-136#12362#12498
25.2M → Finish22438-416#12498#12914
TOTALS2517*4267-1756

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

📊

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