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BOSTON MARATHON 2025

Chun Chung Chen

Bib: 8662•M

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 37%
Gender (Male)
#0 / 16105
Top 50%
Masters (Masters Men)
#0 / 10463
Top 39%
Division (M40-44)
#0 / 2247
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent
Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
5K· 3.11 mi
7:07/mi
22:07
↑ 97↓ 3451.5%
10K· 6.21 mi
7:15/mi
44:38
↑ 79↓ 1380.4%
15K· 9.32 mi
7:16/mi
1:07:13
↑ 67↓ 78
20K· 12.43 mi
7:40/mi
1:31:02
↑ 106↓ 860.1%
Half· 13.11 mi
7:11/mi
1:35:56
↑ 19↓ 370.5%
25K· 15.53 mi
7:12/mi
1:53:23
↑ 66↓ 880.2%
30K· 18.64 mi
7:53/mi
2:17:52
↑ 181↓ 1480.2%
20M
8:04/mi
2:28:50
↑ 64↓ 500.2%
21M
8:59/mi
2:37:49
↑ 106↓ 241.6%
35K· 21.75 mi
7:53/mi
2:43:43
↑ 17↓ 861.7%
23M
8:25/mi
2:54:15
↑ 23↓ 630.6%
24M
8:15/mi
3:02:30
↓ 821.3%
40K· 24.85 mi
8:23/mi
3:09:40
↓ 200.3%
25.2M
9:14/mi
3:12:51
↑ 13↓ 160.2%
Finish· 26.22 mi
8:27/mi
3:21:28
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:35:56
Pace7:19 /mi
2nd Half
Distance13.11 mi
Time1:45:32
Pace8:03 /mi
📊Positive Split: 10.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:47:1922:077:0722:07
7:07
-
10K
6.21 mi11:09:5044:387:1122:31
7:15
+0:08
15K
9.32 mi11:32:251:07:137:1322:35
7:16
+0:01
20K
12.43 mi11:56:141:31:027:2023:49
7:40
+0:24
Half
13.11 mi12:01:081:35:567:194:54
7:11
-0:29
25K
15.53 mi12:18:351:53:237:1817:27
7:12
+0:01
30K
18.64 mi12:43:042:17:527:2424:29
7:53
+0:41
20M
20.00 mi12:54:022:28:507:2610:58
8:04
+0:11
21M
21.00 mi13:03:012:37:497:318:59
8:59
+0:55
35K
21.75 mi13:08:552:43:437:325:54
7:53
-1:06
23M
23.00 mi13:19:272:54:157:3510:32
8:25
+0:32
24M
24.00 mi13:27:423:02:307:368:15
8:15
-0:10
40K
24.85 mi13:34:523:09:407:387:10
8:23
+0:08
25.2M
25.20 mi13:38:033:12:517:393:11
9:14
+0:51
Finish
26.22 mi13:46:403:21:287:418:37
8:27
-0:47

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

7:07 /mi

Average Pace

7:41 /mi

Slowest Pace

9:14 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:29:34

44% of race

Time at Steady Pace

1:05:10

32% of race

Time at Slower Pace

46:44

23% of race

Average Pace: 7:41 /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 mi10:47:1922:077:0722:07
7:07
#8808
10K
6.21 mi11:09:5044:387:1122:31
7:15
#9304
15K
9.32 mi11:32:251:07:137:1322:35
7:16
#9411
20K
12.43 mi11:56:141:31:027:2023:49
7:40
#10089
Half
13.11 mi12:01:081:35:567:194:54
7:11
#10026
25K
15.53 mi12:18:351:53:237:1817:27
7:12
#9560
30K
18.64 mi12:43:042:17:527:2424:29
7:53
#9667
20M
20.00 mi12:54:022:28:507:2610:58
8:04
#9719
21M
21.00 mi13:03:012:37:497:318:59
8:59
#9937
35K
21.75 mi13:08:552:43:437:325:54
7:53
#9974
23M
23.00 mi13:19:272:54:157:3510:32
8:25
#10150
24M
24.00 mi13:27:423:02:307:368:15
8:15
#10256
40K
24.85 mi13:34:523:09:407:387:10
8:23
#10324
25.2M
25.20 mi13:38:033:12:517:393:11
9:14
#10365
Finish
26.22 mi13:46:403:21:287:418:37
8:27
#10580
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi8808749774979719(Top 34%)7933(Top 49%)7933(Top 353%)
10K6.21 mi3.10 mi9304-4967777-2807777-2809899(Top 35%)8085(Top 50%)8085(Top 360%)
15K9.32 mi3.11 mi9411-1077824-477824-479719(Top 34%)7933(Top 49%)7933(Top 353%)
20K12.43 mi3.11 mi10089-6788155-3318155-33112077(Top 43%)9001(Top 56%)9001(Top 401%)
Half13.11 mi0.68 mi10026+638113+428113+428929(Top 31%)7451(Top 46%)7451(Top 332%)
25K15.53 mi2.42 mi9560+4667828+2857828+2857597(Top 27%)6513(Top 40%)6513(Top 290%)
30K18.64 mi3.11 mi9667-1077830-27830-210488(Top 37%)7924(Top 49%)7924(Top 353%)
20M20.00 mi1.36 mi9719-527828+27828+210874(Top 38%)7967(Top 49%)7967(Top 355%)
21M21.00 mi1.00 mi9937-2187916-887916-8813366(Top 47%)9025(Top 56%)9025(Top 402%)
35K21.75 mi0.75 mi9974-377894+227894+2211424(Top 40%)8058(Top 50%)8058(Top 359%)
23M23.00 mi1.25 mi10150-1767940-467940-4612752(Top 45%)8579(Top 53%)8579(Top 382%)
24M24.00 mi1.00 mi10256-1067962-227962-2212882(Top 45%)8586(Top 53%)8586(Top 382%)
40K24.85 mi0.85 mi10324-687962796212642(Top 45%)8348(Top 52%)8348(Top 372%)
25.2M25.20 mi0.35 mi10365-417965-37965-313011(Top 46%)8456(Top 53%)8456(Top 376%)
Finish26.22 mi1.02 mi10580-2158042-778042-7715895(Top 56%)9877(Top 61%)9877(Top 440%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 34%
×21story building
+97ft-345ft

Overall

9719

Males

7933

M40-44

7933

5K→10K

3.1 - 6.2 mi

Top 35%
×5story building
+79ft-138ft

Overall

9899

Males

8085

M40-44

8085

10K→15K

6.2 - 9.3 mi

Top 34%
×3story building
+67ft-78ft

Overall

9719

Males

7933

M40-44

7933

15K→20K

9.3 - 12.4 mi

Top 43%
×5story building
+106ft-86ft

Overall

12077

Males

9001

M40-44

9001

20K→Half

12.4 - 13.1 mi

Top 31%
×2story building
+19ft-37ft

Overall

8929

Males

7451

M40-44

7451

Half→25K

13.1 - 15.5 mi

Top 27%
×4story building
+66ft-88ft

Overall

7597

Males

6513

M40-44

6513

25K→30K

15.5 - 18.6 mi

Top 37%
×9story building
+181ft-148ft

Overall

10488

Males

7924

M40-44

7924

30K→20M

18.6 - 20.0 mi

Top 38%
×5story building
+64ft-50ft

Overall

10874

Males

7967

M40-44

7967

20M→21M

20.0 - 21.0 mi

Top 47%
×8story building
+106ft-24ft

Overall

13366

Males

9025

M40-44

9025

21M→35K

21.0 - 21.8 mi

Top 40%
×7story building
+17ft-86ft

Overall

11424

Males

8058

M40-44

8058

35K→23M

21.8 - 23.0 mi

Top 45%
×5story building
+23ft-63ft

Overall

12752

Males

8579

M40-44

8579

23M→24M

23.0 - 24.0 mi

Top 45%
×6story building
+12ft-82ft

Overall

12882

Males

8586

M40-44

8586

24M→40K

24.0 - 24.9 mi

Top 45%
×1story
+6ft-20ft

Overall

12642

Males

8348

M40-44

8348

40K→25.2M

24.9 - 25.2 mi

Top 46%
×1story
+13ft-16ft

Overall

13011

Males

8456

M40-44

8456

25.2M→Finish

25.2 - 26.2 mi

Top 56%
×2story building
+22ft-21ft

Overall

15895

Males

9877

M40-44

9877

Passing Analysis

Category:
Athletes Passed
1407*
Passed By
3172
Net Change
-1772
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#8808
5K → 10K74570-496#8808#9304
10K → 15K115222-107#9304#9411
15K → 20K59735-678#9411#10089
20K → Half718+63#10089#10026
Half → 25K472*6+466#10026#9560
25K → 30K199306-107#9560#9667
30K → 20M93144-52#9667#9719
20M → 21M40257-218#9719#9937
21M → 35K6197-37#9937#9974
35K → 23M58232-176#9974#10150
23M → 24M56162-106#10150#10256
24M → 40K66134-68#10256#10324
40K → 25.2M1960-41#10324#10365
25.2M → Finish24239-215#10365#10580
TOTALS1407*3172-1772

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

📊

Passing Visuals

Category:
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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