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BOSTON MARATHON 2025

Guo Chen

Bib: 9798•M

MS

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 17%
Gender (Male)
#0 / 16105
Top 28%
Masters (Masters Men)
#0 / 10463
Top 14%
Division (M45-49)
#0 / 2386
Top 18%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
20:42
Rank: #5112
Start → 5K
20:42 | 6:40/mi
10K· 6.21 mi
41:17
Rank: #4855 (+257)
5K → 10K
20:35 | 6:38/mi
15K· 9.32 mi
1:02:05
Rank: #4877 (-22)
10K → 15K
20:48 | 6:42/mi
20K· 12.43 mi
1:23:15
Rank: #4979 (-102)
15K → 20K
21:10 | 6:49/mi
Half· 13.11 mi
1:27:53
Rank: #5029 (-50)
20K → Half
4:38 | 6:47/mi
25K· 15.53 mi
1:44:19
Rank: #4935 (+94)
Half → 25K
16:26 | 6:47/mi
30K· 18.64 mi
2:06:07
Rank: #4873 (+62)
25K → 30K
21:48 | 7:01/mi
20M
2:15:49
Rank: #4859 (+14)
30K → 20M
9:42 | 7:08/mi
21M
2:23:25
Rank: #4850 (+9)
20M → 21M
7:36 | 7:36/mi
35K· 21.75 mi
2:28:30
Rank: #4793 (+57)
21M → 35K
5:05 | 6:48/mi
23M
2:37:31
Rank: #4770 (+23)
35K → 23M
9:01 | 7:12/mi
24M
2:44:45
Rank: #4837 (-67)
23M → 24M
7:14 | 7:14/mi
40K· 24.85 mi
2:51:11
Rank: #4932 (-95)
24M → 40K
6:26 | 7:31/mi
25.2M
2:53:55
Rank: #4932
40K → 25.2M
2:44 | 7:56/mi
Finish· 26.22 mi
3:00:48
Rank: #4873 (+59)
25.2M → Finish
6:53 | 6:45/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:27:53
Pace6:42 /mi
2nd Half
Distance13.11 mi
Time1:32:55
Pace7:05 /mi
📊Positive Split: 5.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:46:3720:426:4020:42
6:40
-
10K
6.21 mi11:07:1241:176:3920:35
6:38
-0:02
15K
9.32 mi11:28:001:02:056:4020:48
6:42
+0:04
20K
12.43 mi11:49:101:23:156:4221:10
6:49
+0:07
Half
13.11 mi11:53:481:27:536:424:38
6:47
-0:02
25K
15.53 mi12:10:141:44:196:4316:26
6:47
0:00
30K
18.64 mi12:32:022:06:076:4621:48
7:01
+0:14
20M
20.00 mi12:41:442:15:496:479:42
7:08
+0:07
21M
21.00 mi12:49:202:23:256:507:36
7:36
+0:28
35K
21.75 mi12:54:252:28:306:505:05
6:48
-0:48
23M
23.00 mi13:03:262:37:316:519:01
7:12
+0:24
24M
24.00 mi13:10:402:44:456:527:14
7:14
+0:02
40K
24.85 mi13:17:062:51:116:536:26
7:31
+0:17
25.2M
25.20 mi13:19:502:53:556:542:44
7:56
+0:25
Finish
26.22 mi13:26:433:00:486:546:53
6:45
-1:11

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

6:38 /mi

Average Pace

6:54 /mi

Slowest Pace

7:56 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:44:02

91% of race

Time at Steady Pace

14:02

8% of race

Time at Slower Pace

2:44

2% of race

Average Pace: 6:54 /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 mi10:46:3720:426:4020:42
6:40
#5112
10K
6.21 mi11:07:1241:176:3920:35
6:38
#4855
15K
9.32 mi11:28:001:02:056:4020:48
6:42
#4877
20K
12.43 mi11:49:101:23:156:4221:10
6:49
#4979
Half
13.11 mi11:53:481:27:536:424:38
6:47
#5029
25K
15.53 mi12:10:141:44:196:4316:26
6:47
#4935
30K
18.64 mi12:32:022:06:076:4621:48
7:01
#4873
20M
20.00 mi12:41:442:15:496:479:42
7:08
#4859
21M
21.00 mi12:49:202:23:256:507:36
7:36
#4850
35K
21.75 mi12:54:252:28:306:505:05
6:48
#4793
23M
23.00 mi13:03:262:37:316:519:01
7:12
#4770
24M
24.00 mi13:10:402:44:456:527:14
7:14
#4837
40K
24.85 mi13:17:062:51:116:536:26
7:31
#4932
25.2M
25.20 mi13:19:502:53:556:542:44
7:56
#4932
Finish
26.22 mi13:26:433:00:486:546:53
6:45
#4873
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi5112476847685018(Top 18%)4663(Top 29%)4663(Top 195%)
10K6.21 mi3.10 mi4855+2574536+2324536+2324656(Top 16%)4358(Top 27%)4358(Top 183%)
15K9.32 mi3.11 mi4877-224554-184554-185018(Top 18%)4663(Top 29%)4663(Top 195%)
20K12.43 mi3.11 mi4979-1024635-814635-815405(Top 19%)4952(Top 31%)4952(Top 208%)
Half13.11 mi0.68 mi5029-504675-404675-405993(Top 21%)5414(Top 34%)5414(Top 227%)
25K15.53 mi2.42 mi4935+944585+904585+904696(Top 17%)4325(Top 27%)4325(Top 181%)
30K18.64 mi3.11 mi4873+624507+784507+784785(Top 17%)4360(Top 27%)4360(Top 183%)
20M20.00 mi1.36 mi4859+144495+124495+124854(Top 17%)4369(Top 27%)4369(Top 183%)
21M21.00 mi1.00 mi4850+94475+204475+205103(Top 18%)4449(Top 28%)4449(Top 186%)
35K21.75 mi0.75 mi4793+574419+564419+564067(Top 14%)3642(Top 23%)3642(Top 153%)
23M23.00 mi1.25 mi4770+234388+314388+314863(Top 17%)4214(Top 26%)4214(Top 177%)
24M24.00 mi1.00 mi4837-674435-474435-475987(Top 21%)4901(Top 30%)4901(Top 205%)
40K24.85 mi0.85 mi4932-954505-704505-706893(Top 24%)5348(Top 33%)5348(Top 224%)
25.2M25.20 mi0.35 mi49324500+54500+55495(Top 19%)4413(Top 27%)4413(Top 185%)
Finish26.22 mi1.02 mi4873+594447+534447+534208(Top 15%)3585(Top 22%)3585(Top 150%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 18%
×21stories
+97ft-345ft

Overall

5018

Males

4663

M45-49

4663

5K→10K

3.1 - 6.2 mi

Top 16%
×5stories
+79ft-138ft

Overall

4656

Males

4358

M45-49

4358

10K→15K

6.2 - 9.3 mi

Top 18%
×3stories
+67ft-78ft

Overall

5018

Males

4663

M45-49

4663

15K→20K

9.3 - 12.4 mi

Top 19%
×5stories
+106ft-86ft

Overall

5405

Males

4952

M45-49

4952

20K→Half

12.4 - 13.1 mi

Top 21%
×2stories
+19ft-37ft

Overall

5993

Males

5414

M45-49

5414

Half→25K

13.1 - 15.5 mi

Top 17%
×4stories
+66ft-88ft

Overall

4696

Males

4325

M45-49

4325

25K→30K

15.5 - 18.6 mi

Top 17%
×9stories
+181ft-148ft

Overall

4785

Males

4360

M45-49

4360

30K→20M

18.6 - 20.0 mi

Top 17%
×5stories
+64ft-50ft

Overall

4854

Males

4369

M45-49

4369

20M→21M

20.0 - 21.0 mi

Top 18%
×8stories
+106ft-24ft

Overall

5103

Males

4449

M45-49

4449

21M→35K

21.0 - 21.8 mi

Top 14%
×7stories
+17ft-86ft

Overall

4067

Males

3642

M45-49

3642

35K→23M

21.8 - 23.0 mi

Top 17%
×5stories
+23ft-63ft

Overall

4863

Males

4214

M45-49

4214

23M→24M

23.0 - 24.0 mi

Top 21%
×6stories
+12ft-82ft

Overall

5987

Males

4901

M45-49

4901

24M→40K

24.0 - 24.9 mi

Top 24%
×1story
+6ft-20ft

Overall

6893

Males

5348

M45-49

5348

40K→25.2M

24.9 - 25.2 mi

Top 19%
×1story
+13ft-16ft

Overall

5495

Males

4413

M45-49

4413

25.2M→Finish

25.2 - 26.2 mi

Top 15%
×2stories
+22ft-21ft

Overall

4208

Males

3585

M45-49

3585

Passing Analysis

Category:
Athletes Passed
1374
Passed By
1135
Net Change
+239
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#5112
5K → 10K32669+257#5112#4855
10K → 15K102124-22#4855#4877
15K → 20K100202-102#4877#4979
20K → Half1262-50#4979#5029
Half → 25K14248+94#5029#4935
25K → 30K187125+62#4935#4873
30K → 20M7965+14#4873#4859
20M → 21M6960+9#4859#4850
21M → 35K7720+57#4850#4793
35K → 23M9471+23#4793#4770
23M → 24M42109-67#4770#4837
24M → 40K32127-95#4837#4932
40K → 25.2M28280#4932#4932
25.2M → Finish8425+59#4932#4873
TOTALS13741135+239
📊

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