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BOSTON MARATHON 2025

Stan Chen

Bib: 3433•M

NJ

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 9%
Gender (Male)
#0 / 16105
Top 15%
Division (M18-39)
#0 / 5642
Top 35%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
20:08
Rank: #3696
Start → 5K
20:08 | 6:29/mi
10K· 6.21 mi
39:54
Rank: #3211 (+485)
5K → 10K
19:46 | 6:22/mi
15K· 9.32 mi
59:44
Rank: #3064 (+147)
10K → 15K
19:50 | 6:23/mi
20K· 12.43 mi
1:19:47
Rank: #2984 (+80)
15K → 20K
20:03 | 6:27/mi
Half· 13.11 mi
1:24:08
Rank: #2973 (+11)
20K → Half
4:21 | 6:23/mi
25K· 15.53 mi
1:39:18
Rank: #2692 (+281)
Half → 25K
15:10 | 6:15/mi
30K· 18.64 mi
1:59:34
Rank: #2527 (+165)
25K → 30K
20:16 | 6:31/mi
20M
2:08:54
Rank: #2546 (-19)
30K → 20M
9:20 | 6:52/mi
21M
2:16:04
Rank: #2544 (+2)
20M → 21M
7:10 | 7:10/mi
35K· 21.75 mi
2:21:01
Rank: #2550 (-6)
21M → 35K
4:57 | 6:37/mi
23M
2:29:38
Rank: #2546 (+4)
35K → 23M
8:37 | 6:53/mi
24M
2:36:34
Rank: #2591 (-45)
23M → 24M
6:56 | 6:56/mi
40K· 24.85 mi
2:42:23
Rank: #2570 (+21)
24M → 40K
5:49 | 6:48/mi
25.2M
2:44:56
Rank: #2567 (+3)
40K → 25.2M
2:33 | 7:24/mi
Finish· 26.22 mi
2:51:41
Rank: #2572 (-5)
25.2M → Finish
6:45 | 6:37/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:24:08
Pace6:25 /mi
2nd Half
Distance13.11 mi
Time1:27:33
Pace6:41 /mi
📊Positive Split: 4.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:23:1020:086:2920:08
6:29
-
10K
6.21 mi10:42:5639:546:2519:46
6:22
-0:07
15K
9.32 mi11:02:4659:446:2519:50
6:23
+0:01
20K
12.43 mi11:22:491:19:476:2520:03
6:27
+0:04
Half
13.11 mi11:27:101:24:086:254:21
6:23
-0:04
25K
15.53 mi11:42:201:39:186:2415:10
6:15
-0:08
30K
18.64 mi12:02:361:59:346:2520:16
6:31
+0:16
20M
20.00 mi12:11:562:08:546:279:20
6:52
+0:21
21M
21.00 mi12:19:062:16:046:297:10
7:10
+0:18
35K
21.75 mi12:24:032:21:016:294:57
6:37
-0:33
23M
23.00 mi12:32:402:29:386:308:37
6:53
+0:16
24M
24.00 mi12:39:362:36:346:316:56
6:56
+0:03
40K
24.85 mi12:45:252:42:236:325:49
6:48
-0:08
25.2M
25.20 mi12:47:582:44:566:332:33
7:24
+0:36
Finish
26.22 mi12:54:432:51:416:336:45
6:37
-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

6:15 /mi

Average Pace

6:33 /mi

Slowest Pace

7:24 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:26:25

85% of race

Time at Steady Pace

22:43

13% of race

Time at Slower Pace

2:33

1% of race

Average Pace: 6:33 /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 mi10:23:1020:086:2920:08
6:29
#3696
10K
6.21 mi10:42:5639:546:2519:46
6:22
#3211
15K
9.32 mi11:02:4659:446:2519:50
6:23
#3064
20K
12.43 mi11:22:491:19:476:2520:03
6:27
#2984
Half
13.11 mi11:27:101:24:086:254:21
6:23
#2973
25K
15.53 mi11:42:201:39:186:2415:10
6:15
#2692
30K
18.64 mi12:02:361:59:346:2520:16
6:31
#2527
20M
20.00 mi12:11:562:08:546:279:20
6:52
#2546
21M
21.00 mi12:19:062:16:046:297:10
7:10
#2544
35K
21.75 mi12:24:032:21:016:294:57
6:37
#2550
23M
23.00 mi12:32:402:29:386:308:37
6:53
#2546
24M
24.00 mi12:39:362:36:346:316:56
6:56
#2591
40K
24.85 mi12:45:252:42:236:325:49
6:48
#2570
25.2M
25.20 mi12:47:582:44:566:332:33
7:24
#2567
Finish
26.22 mi12:54:432:51:416:336:45
6:37
#2572
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi3696350235022843(Top 10%)2708(Top 17%)2708(Top 48%)
10K6.21 mi3.10 mi3211+4853053+4493053+4492817(Top 10%)2683(Top 17%)2683(Top 48%)
15K9.32 mi3.11 mi3064+1472917+1362917+1362843(Top 10%)2708(Top 17%)2708(Top 48%)
20K12.43 mi3.11 mi2984+802844+732844+732846(Top 10%)2710(Top 17%)2710(Top 48%)
Half13.11 mi0.68 mi2973+112834+102834+102961(Top 10%)2828(Top 18%)2828(Top 50%)
25K15.53 mi2.42 mi2692+2812568+2662568+2661686(Top 6%)1603(Top 10%)1603(Top 28%)
30K18.64 mi3.11 mi2527+1652413+1552413+1552095(Top 7%)1992(Top 12%)1992(Top 35%)
20M20.00 mi1.36 mi2546-192430-172430-173325(Top 12%)3076(Top 19%)3076(Top 55%)
21M21.00 mi1.00 mi2544+22426+42426+43001(Top 11%)2775(Top 17%)2775(Top 49%)
35K21.75 mi0.75 mi2550-62429-32429-33065(Top 11%)2820(Top 18%)2820(Top 50%)
23M23.00 mi1.25 mi2546+42423+62423+63128(Top 11%)2858(Top 18%)2858(Top 51%)
24M24.00 mi1.00 mi2591-452458-352458-354260(Top 15%)3741(Top 23%)3741(Top 66%)
40K24.85 mi0.85 mi2570+212438+202438+202871(Top 10%)2597(Top 16%)2597(Top 46%)
25.2M25.20 mi0.35 mi2567+32432+62432+62952(Top 10%)2631(Top 16%)2631(Top 47%)
Finish26.22 mi1.02 mi2572-52437-52437-53474(Top 12%)3043(Top 19%)3043(Top 54%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 10%
×21stories
+97ft-345ft

Overall

2843

Males

2708

M18-39

2708

5K→10K

3.1 - 6.2 mi

Top 10%
×5stories
+79ft-138ft

Overall

2817

Males

2683

M18-39

2683

10K→15K

6.2 - 9.3 mi

Top 10%
×3stories
+67ft-78ft

Overall

2843

Males

2708

M18-39

2708

15K→20K

9.3 - 12.4 mi

Top 10%
×5stories
+106ft-86ft

Overall

2846

Males

2710

M18-39

2710

20K→Half

12.4 - 13.1 mi

Top 10%
×2stories
+19ft-37ft

Overall

2961

Males

2828

M18-39

2828

Half→25K

13.1 - 15.5 mi

Top 6%
×4stories
+66ft-88ft

Overall

1686

Males

1603

M18-39

1603

25K→30K

15.5 - 18.6 mi

Top 7%
×9stories
+181ft-148ft

Overall

2095

Males

1992

M18-39

1992

30K→20M

18.6 - 20.0 mi

Top 12%
×5stories
+64ft-50ft

Overall

3325

Males

3076

M18-39

3076

20M→21M

20.0 - 21.0 mi

Top 11%
×8stories
+106ft-24ft

Overall

3001

Males

2775

M18-39

2775

21M→35K

21.0 - 21.8 mi

Top 11%
×7stories
+17ft-86ft

Overall

3065

Males

2820

M18-39

2820

35K→23M

21.8 - 23.0 mi

Top 11%
×5stories
+23ft-63ft

Overall

3128

Males

2858

M18-39

2858

23M→24M

23.0 - 24.0 mi

Top 15%
×6stories
+12ft-82ft

Overall

4260

Males

3741

M18-39

3741

24M→40K

24.0 - 24.9 mi

Top 10%
×1story
+6ft-20ft

Overall

2871

Males

2597

M18-39

2597

40K→25.2M

24.9 - 25.2 mi

Top 10%
×1story
+13ft-16ft

Overall

2952

Males

2631

M18-39

2631

25.2M→Finish

25.2 - 26.2 mi

Top 12%
×2stories
+22ft-21ft

Overall

3474

Males

3043

M18-39

3043

Passing Analysis

Category:
Athletes Passed
1579
Passed By
455
Net Change
+1124
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#3696
5K → 10K50520+485#3696#3211
10K → 15K17023+147#3211#3064
15K → 20K12141+80#3064#2984
20K → Half209+11#2984#2973
Half → 25K2832+281#2973#2692
25K → 30K18419+165#2692#2527
30K → 20M4463-19#2527#2546
20M → 21M5149+2#2546#2544
21M → 35K2935-6#2544#2550
35K → 23M5652+4#2550#2546
23M → 24M2873-45#2546#2591
24M → 40K3918+21#2591#2570
40K → 25.2M2118+3#2570#2567
25.2M → Finish2833-5#2567#2572
TOTALS1579455+1124
📊

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