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BOSTON MARATHON 2025

Xiao Chen

Bib: 801•M

MA

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 2%
Gender (Male)
#0 / 16105
Top 3%
Division (M18-39)
#0 / 5642
Top 7%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
17:59
Rank: #591
Start → 5K
17:59 | 5:47/mi
10K· 6.21 mi
36:14
Rank: #649 (-58)
5K → 10K
18:15 | 5:52/mi
15K· 9.32 mi
54:38
Rank: #693 (-44)
10K → 15K
18:24 | 5:55/mi
20K· 12.43 mi
1:13:12
Rank: #719 (-26)
15K → 20K
18:34 | 5:59/mi
Half· 13.11 mi
1:17:11
Rank: #709 (+10)
20K → Half
3:59 | 5:50/mi
25K· 15.53 mi
1:31:43
Rank: #703 (+6)
Half → 25K
14:32 | 6:00/mi
30K· 18.64 mi
1:50:34
Rank: #666 (+37)
25K → 30K
18:51 | 6:04/mi
20M
1:58:49
Rank: #639 (+27)
30K → 20M
8:15 | 6:04/mi
21M
2:05:17
Rank: #623 (+16)
20M → 21M
6:28 | 6:28/mi
35K· 21.75 mi
2:09:40
Rank: #609 (+14)
21M → 35K
4:23 | 5:52/mi
23M
2:17:11
Rank: #580 (+29)
35K → 23M
7:31 | 6:00/mi
24M
2:23:04
Rank: #564 (+16)
23M → 24M
5:53 | 5:53/mi
40K· 24.85 mi
2:28:11
Rank: #546 (+18)
24M → 40K
5:07 | 5:59/mi
25.2M
2:30:27
Rank: #541 (+5)
40K → 25.2M
2:16 | 6:34/mi
Finish· 26.22 mi
2:36:20
Rank: #523 (+18)
25.2M → Finish
5:53 | 5:46/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:17:11
Pace5:53 /mi
2nd Half
Distance13.11 mi
Time1:19:09
Pace6:02 /mi
📊Positive Split: 2.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:18:1217:595:4717:59
5:47
-
10K
6.21 mi10:36:2736:145:5018:15
5:52
+0:05
15K
9.32 mi10:54:5154:385:5218:24
5:55
+0:03
20K
12.43 mi11:13:251:13:125:5318:34
5:59
+0:04
Half
13.11 mi11:17:241:17:115:533:59
5:50
-0:09
25K
15.53 mi11:31:561:31:435:5414:32
6:00
+0:10
30K
18.64 mi11:50:471:50:345:5618:51
6:04
+0:04
20M
20.00 mi11:59:021:58:495:568:15
6:04
0:00
21M
21.00 mi12:05:302:05:175:586:28
6:28
+0:24
35K
21.75 mi12:09:532:09:405:584:23
5:52
-0:36
23M
23.00 mi12:17:242:17:115:587:31
6:00
+0:08
24M
24.00 mi12:23:172:23:045:585:53
5:53
-0:07
40K
24.85 mi12:28:242:28:115:585:07
5:59
+0:06
25.2M
25.20 mi12:30:402:30:275:582:16
6:34
+0:35
Finish
26.22 mi12:36:332:36:205:585:53
5:46
-0:48

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

5:46 /mi

Average Pace

5:58 /mi

Slowest Pace

6:34 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:27:36

94% of race

Time at Steady Pace

8:44

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 5:58 /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 mi10:18:1217:595:4717:59
5:47
#591
10K
6.21 mi10:36:2736:145:5018:15
5:52
#649
15K
9.32 mi10:54:5154:385:5218:24
5:55
#693
20K
12.43 mi11:13:251:13:125:5318:34
5:59
#719
Half
13.11 mi11:17:241:17:115:533:59
5:50
#709
25K
15.53 mi11:31:561:31:435:5414:32
6:00
#703
30K
18.64 mi11:50:471:50:345:5618:51
6:04
#666
20M
20.00 mi11:59:021:58:495:568:15
6:04
#639
21M
21.00 mi12:05:302:05:175:586:28
6:28
#623
35K
21.75 mi12:09:532:09:405:584:23
5:52
#609
23M
23.00 mi12:17:242:17:115:587:31
6:00
#580
24M
24.00 mi12:23:172:23:045:585:53
5:53
#564
40K
24.85 mi12:28:242:28:115:585:07
5:59
#546
25.2M
25.20 mi12:30:402:30:275:582:16
6:34
#541
Finish
26.22 mi12:36:332:36:205:585:53
5:46
#523
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi591547547805(Top 3%)754(Top 5%)754(Top 13%)
10K6.21 mi3.10 mi649-58603-56603-56768(Top 3%)719(Top 4%)719(Top 13%)
15K9.32 mi3.11 mi693-44645-42645-42805(Top 3%)754(Top 5%)754(Top 13%)
20K12.43 mi3.11 mi719-26670-25670-25814(Top 3%)765(Top 5%)765(Top 14%)
Half13.11 mi0.68 mi709+10661+9661+9655(Top 2%)612(Top 4%)612(Top 11%)
25K15.53 mi2.42 mi703+6655+6655+6775(Top 3%)727(Top 5%)727(Top 13%)
30K18.64 mi3.11 mi666+37619+36619+36612(Top 2%)571(Top 4%)571(Top 10%)
20M20.00 mi1.36 mi639+27592+27592+27487(Top 2%)456(Top 3%)456(Top 8%)
21M21.00 mi1.00 mi623+16576+16576+16604(Top 2%)568(Top 4%)568(Top 10%)
35K21.75 mi0.75 mi609+14563+13563+13466(Top 2%)434(Top 3%)434(Top 8%)
23M23.00 mi1.25 mi580+29535+28535+28345(Top 1%)323(Top 2%)323(Top 6%)
24M24.00 mi1.00 mi564+16519+16519+16375(Top 1%)348(Top 2%)348(Top 6%)
40K24.85 mi0.85 mi546+18502+17502+17370(Top 1%)343(Top 2%)343(Top 6%)
25.2M25.20 mi0.35 mi541+5497+5497+5540(Top 2%)500(Top 3%)500(Top 9%)
Finish26.22 mi1.02 mi523+18483+14483+14465(Top 2%)436(Top 3%)436(Top 8%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 3%
×21stories
+97ft-345ft

Overall

805

Males

754

M18-39

754

5K→10K

3.1 - 6.2 mi

Top 3%
×5stories
+79ft-138ft

Overall

768

Males

719

M18-39

719

10K→15K

6.2 - 9.3 mi

Top 3%
×3stories
+67ft-78ft

Overall

805

Males

754

M18-39

754

15K→20K

9.3 - 12.4 mi

Top 3%
×5stories
+106ft-86ft

Overall

814

Males

765

M18-39

765

20K→Half

12.4 - 13.1 mi

Top 2%
×2stories
+19ft-37ft

Overall

655

Males

612

M18-39

612

Half→25K

13.1 - 15.5 mi

Top 3%
×4stories
+66ft-88ft

Overall

775

Males

727

M18-39

727

25K→30K

15.5 - 18.6 mi

Top 2%
×9stories
+181ft-148ft

Overall

612

Males

571

M18-39

571

30K→20M

18.6 - 20.0 mi

Top 2%
×5stories
+64ft-50ft

Overall

487

Males

456

M18-39

456

20M→21M

20.0 - 21.0 mi

Top 2%
×8stories
+106ft-24ft

Overall

604

Males

568

M18-39

568

21M→35K

21.0 - 21.8 mi

Top 2%
×7stories
+17ft-86ft

Overall

466

Males

434

M18-39

434

35K→23M

21.8 - 23.0 mi

Top 1%
×5stories
+23ft-63ft

Overall

345

Males

323

M18-39

323

23M→24M

23.0 - 24.0 mi

Top 1%
×6stories
+12ft-82ft

Overall

375

Males

348

M18-39

348

24M→40K

24.0 - 24.9 mi

Top 1%
×1story
+6ft-20ft

Overall

370

Males

343

M18-39

343

40K→25.2M

24.9 - 25.2 mi

Top 2%
×1story
+13ft-16ft

Overall

540

Males

500

M18-39

500

25.2M→Finish

25.2 - 26.2 mi

Top 2%
×2stories
+22ft-21ft

Overall

465

Males

436

M18-39

436

Passing Analysis

Category:
Athletes Passed
298
Passed By
230
Net Change
+68
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#591
5K → 10K1472-58#591#649
10K → 15K1155-44#649#693
15K → 20K1743-26#693#719
20K → Half111+10#719#709
Half → 25K2620+6#709#703
25K → 30K5417+37#703#666
30K → 20M292+27#666#639
20M → 21M248+16#639#623
21M → 35K162+14#623#609
35K → 23M312+29#609#580
23M → 24M171+16#580#564
24M → 40K202+18#564#546
40K → 25.2M83+5#546#541
25.2M → Finish202+18#541#523
TOTALS298230+68
📊

Passing Visuals

Category:
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🔥Passing Intensity

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🔄Passing Circle

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🌊Position Flow

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🏃Race Lanes

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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing