Boston Marathon logo
BOSTON MARATHON 2025

Hao Chen

Bib: 4220•M

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 28404
Top 11%
Gender (Male)
#0 / 16105
Top 19%
Division (M18-39)
#0 / 5642
Top 41%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
19:55
Rank: #3197
Start → 5K
19:55 | 6:25/mi
10K· 6.21 mi
40:03
Rank: #3365 (-168)
5K → 10K
20:08 | 6:29/mi
15K· 9.32 mi
1:00:06
Rank: #3304 (+61)
10K → 15K
20:03 | 6:27/mi
20K· 12.43 mi
1:20:35
Rank: #3395 (-91)
15K → 20K
20:29 | 6:36/mi
Half· 13.11 mi
1:25:02
Rank: #3411 (-16)
20K → Half
4:27 | 6:31/mi
25K· 15.53 mi
1:41:01
Rank: #3401 (+10)
Half → 25K
15:59 | 6:36/mi
30K· 18.64 mi
2:01:58
Rank: #3282 (+119)
25K → 30K
20:57 | 6:45/mi
20M
2:11:15
Rank: #3222 (+60)
30K → 20M
9:17 | 6:50/mi
21M
2:18:27
Rank: #3188 (+34)
20M → 21M
7:12 | 7:12/mi
35K· 21.75 mi
2:23:20
Rank: #3141 (+47)
21M → 35K
4:53 | 6:32/mi
23M
2:32:03
Rank: #3115 (+26)
35K → 23M
8:43 | 6:58/mi
24M
2:38:59
Rank: #3129 (-14)
23M → 24M
6:56 | 6:56/mi
40K· 24.85 mi
2:45:02
Rank: #3128 (+1)
24M → 40K
6:03 | 7:05/mi
25.2M
2:47:46
Rank: #3139 (-11)
40K → 25.2M
2:44 | 7:56/mi
Finish· 26.22 mi
2:54:53
Rank: #3211 (-72)
25.2M → Finish
7:07 | 6:59/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
Time1:25:02
Pace6:29 /mi
2nd Half
Distance13.11 mi
Time1:29:51
Pace6:51 /mi
📊Positive Split: 5.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:21:5119:556:2519:55
6:25
-
10K
6.21 mi10:41:5940:036:2720:08
6:29
+0:04
15K
9.32 mi11:02:021:00:066:2720:03
6:27
-0:02
20K
12.43 mi11:22:311:20:356:2920:29
6:36
+0:09
Half
13.11 mi11:26:581:25:026:294:27
6:31
-0:05
25K
15.53 mi11:42:571:41:016:3015:59
6:36
+0:05
30K
18.64 mi12:03:542:01:586:3320:57
6:45
+0:09
20M
20.00 mi12:13:112:11:156:349:17
6:50
+0:05
21M
21.00 mi12:20:232:18:276:367:12
7:12
+0:22
35K
21.75 mi12:25:162:23:206:354:53
6:32
-0:40
23M
23.00 mi12:33:592:32:036:378:43
6:58
+0:26
24M
24.00 mi12:40:552:38:596:376:56
6:56
-0:02
40K
24.85 mi12:46:582:45:026:386:03
7:05
+0:09
25.2M
25.20 mi12:49:422:47:466:392:44
7:56
+0:51
Finish
26.22 mi12:56:492:54:536:407:07
6:59
-0:57

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

6:25 /mi

Average Pace

6:40 /mi

Slowest Pace

7:56 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:09:26

40% of race

Time at Steady Pace

1:13:38

42% of race

Time at Slower Pace

31:49

18% of race

Average Pace: 6:40 /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 mi10:21:5119:556:2519:55
6:25
#3197
10K
6.21 mi10:41:5940:036:2720:08
6:29
#3365
15K
9.32 mi11:02:021:00:066:2720:03
6:27
#3304
20K
12.43 mi11:22:311:20:356:2920:29
6:36
#3395
Half
13.11 mi11:26:581:25:026:294:27
6:31
#3411
25K
15.53 mi11:42:571:41:016:3015:59
6:36
#3401
30K
18.64 mi12:03:542:01:586:3320:57
6:45
#3282
20M
20.00 mi12:13:112:11:156:349:17
6:50
#3222
21M
21.00 mi12:20:232:18:276:367:12
7:12
#3188
35K
21.75 mi12:25:162:23:206:354:53
6:32
#3141
23M
23.00 mi12:33:592:32:036:378:43
6:58
#3115
24M
24.00 mi12:40:552:38:596:376:56
6:56
#3129
40K
24.85 mi12:46:582:45:026:386:03
7:05
#3128
25.2M
25.20 mi12:49:422:47:466:392:44
7:56
#3139
Finish
26.22 mi12:56:492:54:536:407:07
6:59
#3211
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi3197303730373267(Top 12%)3103(Top 19%)3103(Top 55%)
10K6.21 mi3.10 mi3365-1683195-1583195-1583576(Top 13%)3383(Top 21%)3383(Top 60%)
15K9.32 mi3.11 mi3304+613139+563139+563267(Top 12%)3103(Top 19%)3103(Top 55%)
20K12.43 mi3.11 mi3395-913222-833222-833636(Top 13%)3433(Top 21%)3433(Top 61%)
Half13.11 mi0.68 mi3411-163237-153237-153777(Top 13%)3557(Top 22%)3557(Top 63%)
25K15.53 mi2.42 mi3401+103230+73230+73406(Top 12%)3215(Top 20%)3215(Top 57%)
30K18.64 mi3.11 mi3282+1193109+1213109+1213101(Top 11%)2910(Top 18%)2910(Top 52%)
20M20.00 mi1.36 mi3222+603052+573052+573113(Top 11%)2889(Top 18%)2889(Top 51%)
21M21.00 mi1.00 mi3188+343019+333019+333114(Top 11%)2871(Top 18%)2871(Top 51%)
35K21.75 mi0.75 mi3141+472974+452974+452589(Top 9%)2408(Top 15%)2408(Top 43%)
23M23.00 mi1.25 mi3115+262945+292945+293517(Top 12%)3187(Top 20%)3187(Top 56%)
24M24.00 mi1.00 mi3129-142954-92954-94231(Top 15%)3712(Top 23%)3712(Top 66%)
40K24.85 mi0.85 mi3128+12951+32951+34294(Top 15%)3692(Top 23%)3692(Top 65%)
25.2M25.20 mi0.35 mi3139-112954-32954-35464(Top 19%)4382(Top 27%)4382(Top 78%)
Finish26.22 mi1.02 mi3211-723017-633017-635588(Top 20%)4459(Top 28%)4459(Top 79%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 12%
×21stories
+97ft-345ft

Overall

3267

Males

3103

M18-39

3103

5K→10K

3.1 - 6.2 mi

Top 13%
×5stories
+79ft-138ft

Overall

3576

Males

3383

M18-39

3383

10K→15K

6.2 - 9.3 mi

Top 12%
×3stories
+67ft-78ft

Overall

3267

Males

3103

M18-39

3103

15K→20K

9.3 - 12.4 mi

Top 13%
×5stories
+106ft-86ft

Overall

3636

Males

3433

M18-39

3433

20K→Half

12.4 - 13.1 mi

Top 13%
×2stories
+19ft-37ft

Overall

3777

Males

3557

M18-39

3557

Half→25K

13.1 - 15.5 mi

Top 12%
×4stories
+66ft-88ft

Overall

3406

Males

3215

M18-39

3215

25K→30K

15.5 - 18.6 mi

Top 11%
×9stories
+181ft-148ft

Overall

3101

Males

2910

M18-39

2910

30K→20M

18.6 - 20.0 mi

Top 11%
×5stories
+64ft-50ft

Overall

3113

Males

2889

M18-39

2889

20M→21M

20.0 - 21.0 mi

Top 11%
×8stories
+106ft-24ft

Overall

3114

Males

2871

M18-39

2871

21M→35K

21.0 - 21.8 mi

Top 9%
×7stories
+17ft-86ft

Overall

2589

Males

2408

M18-39

2408

35K→23M

21.8 - 23.0 mi

Top 12%
×5stories
+23ft-63ft

Overall

3517

Males

3187

M18-39

3187

23M→24M

23.0 - 24.0 mi

Top 15%
×6stories
+12ft-82ft

Overall

4231

Males

3712

M18-39

3712

24M→40K

24.0 - 24.9 mi

Top 15%
×1story
+6ft-20ft

Overall

4294

Males

3692

M18-39

3692

40K→25.2M

24.9 - 25.2 mi

Top 19%
×1story
+13ft-16ft

Overall

5464

Males

4382

M18-39

4382

25.2M→Finish

25.2 - 26.2 mi

Top 20%
×2stories
+22ft-21ft

Overall

5588

Males

4459

M18-39

4459

Passing Analysis

Category:
Athletes Passed
920
Passed By
934
Net Change
-14
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#3197
5K → 10K71239-168#3197#3365
10K → 15K12362+61#3365#3304
15K → 20K68159-91#3304#3395
20K → Half723-16#3395#3411
Half → 25K7666+10#3411#3401
25K → 30K16243+119#3401#3282
30K → 20M8424+60#3282#3222
20M → 21M7339+34#3222#3188
21M → 35K569+47#3188#3141
35K → 23M7448+26#3141#3115
23M → 24M4054-14#3115#3129
24M → 40K4140+1#3129#3128
40K → 25.2M1930-11#3128#3139
25.2M → Finish2698-72#3139#3211
TOTALS920934-14
📊

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