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BOSTON MARATHON 2025

Biao Chen

Bib: 13871•M

NY

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 32%
Gender (Male)
#0 / 16105
Top 45%
Masters (Masters Men)
#0 / 10463
Top 33%
Division (M55-59)
#0 / 1648
Top 14%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
22:50
Rank: #10833
Start → 5K
22:50 | 7:21/mi
10K· 6.21 mi
45:37
Rank: #10676 (+157)
5K → 10K
22:47 | 7:20/mi
15K· 9.32 mi
1:08:16
Rank: #10419 (+257)
10K → 15K
22:39 | 7:17/mi
20K· 12.43 mi
1:31:04
Rank: #10106 (+313)
15K → 20K
22:48 | 7:20/mi
Half· 13.11 mi
1:36:01
Rank: #10083 (+23)
20K → Half
4:57 | 7:15/mi
25K· 15.53 mi
1:53:53
Rank: #9834 (+249)
Half → 25K
17:52 | 7:22/mi
30K· 18.64 mi
2:17:43
Rank: #9600 (+234)
25K → 30K
23:50 | 7:40/mi
20M
2:28:20
Rank: #9522 (+78)
30K → 20M
10:37 | 7:49/mi
21M
2:36:23
Rank: #9371 (+151)
20M → 21M
8:03 | 8:03/mi
35K· 21.75 mi
2:41:49
Rank: #9243 (+128)
21M → 35K
5:26 | 7:16/mi
23M
2:51:34
Rank: #9137 (+106)
35K → 23M
9:45 | 7:47/mi
24M
2:59:09
Rank: #9066 (+71)
23M → 24M
7:35 | 7:35/mi
40K· 24.85 mi
3:05:48
Rank: #9027 (+39)
24M → 40K
6:39 | 7:47/mi
25.2M
3:08:41
Rank: #8991 (+36)
40K → 25.2M
2:53 | 8:22/mi
Finish· 26.22 mi
3:16:17
Rank: #8953 (+38)
25.2M → Finish
7:36 | 7:27/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:36:01
Pace7:19 /mi
2nd Half
Distance13.11 mi
Time1:40:16
Pace7:39 /mi
📊Positive Split: 4.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:51:4922:507:2122:50
7:21
-
10K
6.21 mi11:14:3645:377:2022:47
7:20
-0:01
15K
9.32 mi11:37:151:08:167:1922:39
7:17
-0:03
20K
12.43 mi12:00:031:31:047:2022:48
7:20
+0:03
Half
13.11 mi12:05:001:36:017:194:57
7:15
-0:05
25K
15.53 mi12:22:521:53:537:2017:52
7:22
+0:07
30K
18.64 mi12:46:422:17:437:2323:50
7:40
+0:18
20M
20.00 mi12:57:192:28:207:2510:37
7:49
+0:09
21M
21.00 mi13:05:222:36:237:278:03
8:03
+0:14
35K
21.75 mi13:10:482:41:497:265:26
7:16
-0:47
23M
23.00 mi13:20:332:51:347:289:45
7:47
+0:31
24M
24.00 mi13:28:082:59:097:287:35
7:35
-0:12
40K
24.85 mi13:34:473:05:487:296:39
7:47
+0:12
25.2M
25.20 mi13:37:403:08:417:292:53
8:22
+0:35
Finish
26.22 mi13:45:163:16:177:307:36
7:27
-0:55

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

7:15 /mi

Average Pace

7:30 /mi

Slowest Pace

8:22 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:05:21

94% of race

Time at Steady Pace

10:56

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:29 /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 mi10:51:4922:507:2122:50
7:21
#10833
10K
6.21 mi11:14:3645:377:2022:47
7:20
#10676
15K
9.32 mi11:37:151:08:167:1922:39
7:17
#10419
20K
12.43 mi12:00:031:31:047:2022:48
7:20
#10106
Half
13.11 mi12:05:001:36:017:194:57
7:15
#10083
25K
15.53 mi12:22:521:53:537:2017:52
7:22
#9834
30K
18.64 mi12:46:422:17:437:2323:50
7:40
#9600
20M
20.00 mi12:57:192:28:207:2510:37
7:49
#9522
21M
21.00 mi13:05:222:36:237:278:03
8:03
#9371
35K
21.75 mi13:10:482:41:497:265:26
7:16
#9243
23M
23.00 mi13:20:332:51:347:289:45
7:47
#9137
24M
24.00 mi13:28:082:59:097:287:35
7:35
#9066
40K
24.85 mi13:34:473:05:487:296:39
7:47
#9027
25.2M
25.20 mi13:37:403:08:417:292:53
8:22
#8991
Finish
26.22 mi13:45:163:16:177:307:36
7:27
#8953
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM55-59Seg. OverallSeg. MalesSeg. M55-59
5K3.11 mi3.11 mi10833860486049911(Top 35%)8034(Top 50%)8034(Top 488%)
10K6.21 mi3.10 mi10676+1578500+1048500+10410592(Top 37%)8453(Top 52%)8453(Top 513%)
15K9.32 mi3.11 mi10419+2578351+1498351+1499911(Top 35%)8034(Top 50%)8034(Top 488%)
20K12.43 mi3.11 mi10106+3138163+1888163+1889345(Top 33%)7653(Top 48%)7653(Top 464%)
Half13.11 mi0.68 mi10083+238145+188145+189538(Top 34%)7773(Top 48%)7773(Top 472%)
25K15.53 mi2.42 mi9834+2497979+1667979+1668882(Top 31%)7271(Top 45%)7271(Top 441%)
30K18.64 mi3.11 mi9600+2347795+1847795+1848981(Top 32%)7127(Top 44%)7127(Top 432%)
20M20.00 mi1.36 mi9522+787713+827713+829097(Top 32%)7047(Top 44%)7047(Top 428%)
21M21.00 mi1.00 mi9371+1517606+1077606+1077635(Top 27%)6053(Top 38%)6053(Top 367%)
35K21.75 mi0.75 mi9243+1287506+1007506+1006989(Top 25%)5699(Top 35%)5699(Top 346%)
23M23.00 mi1.25 mi9137+1067411+957411+958482(Top 30%)6430(Top 40%)6430(Top 390%)
24M24.00 mi1.00 mi9066+717345+667345+668274(Top 29%)6264(Top 39%)6264(Top 380%)
40K24.85 mi0.85 mi9027+397284+617284+618592(Top 30%)6299(Top 39%)6299(Top 382%)
25.2M25.20 mi0.35 mi8991+367247+377247+377933(Top 28%)5874(Top 36%)5874(Top 356%)
Finish26.22 mi1.02 mi8953+387183+647183+648874(Top 31%)6374(Top 40%)6374(Top 387%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 35%
×21stories
+97ft-345ft

Overall

9911

Males

8034

M55-59

8034

5K→10K

3.1 - 6.2 mi

Top 37%
×5stories
+79ft-138ft

Overall

10592

Males

8453

M55-59

8453

10K→15K

6.2 - 9.3 mi

Top 35%
×3stories
+67ft-78ft

Overall

9911

Males

8034

M55-59

8034

15K→20K

9.3 - 12.4 mi

Top 33%
×5stories
+106ft-86ft

Overall

9345

Males

7653

M55-59

7653

20K→Half

12.4 - 13.1 mi

Top 34%
×2stories
+19ft-37ft

Overall

9538

Males

7773

M55-59

7773

Half→25K

13.1 - 15.5 mi

Top 31%
×4stories
+66ft-88ft

Overall

8882

Males

7271

M55-59

7271

25K→30K

15.5 - 18.6 mi

Top 32%
×9stories
+181ft-148ft

Overall

8981

Males

7127

M55-59

7127

30K→20M

18.6 - 20.0 mi

Top 32%
×5stories
+64ft-50ft

Overall

9097

Males

7047

M55-59

7047

20M→21M

20.0 - 21.0 mi

Top 27%
×8stories
+106ft-24ft

Overall

7635

Males

6053

M55-59

6053

21M→35K

21.0 - 21.8 mi

Top 25%
×7stories
+17ft-86ft

Overall

6989

Males

5699

M55-59

5699

35K→23M

21.8 - 23.0 mi

Top 30%
×5stories
+23ft-63ft

Overall

8482

Males

6430

M55-59

6430

23M→24M

23.0 - 24.0 mi

Top 29%
×6stories
+12ft-82ft

Overall

8274

Males

6264

M55-59

6264

24M→40K

24.0 - 24.9 mi

Top 30%
×1story
+6ft-20ft

Overall

8592

Males

6299

M55-59

6299

40K→25.2M

24.9 - 25.2 mi

Top 28%
×1story
+13ft-16ft

Overall

7933

Males

5874

M55-59

5874

25.2M→Finish

25.2 - 26.2 mi

Top 31%
×2stories
+22ft-21ft

Overall

8874

Males

6374

M55-59

6374

Passing Analysis

Category:
Athletes Passed
2640*
Passed By
759
Net Change
+1880
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#10833
5K → 10K345188+157#10833#10676
10K → 15K30851+257#10676#10419
15K → 20K35238+313#10419#10106
20K → Half4522+23#10106#10083
Half → 25K287*38+249#10083#9834
25K → 30K341107+234#9834#9600
30K → 20M13860+78#9600#9522
20M → 21M16918+151#9522#9371
21M → 35K14012+128#9371#9243
35K → 23M15751+106#9243#9137
23M → 24M10635+71#9137#9066
24M → 40K10667+39#9066#9027
40K → 25.2M5418+36#9027#8991
25.2M → Finish9254+38#8991#8953
TOTALS2640*759+1880

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

📊

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