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BOSTON MARATHON 2025

Norris Chin

Bib: 3154•M

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 8%
Gender (Male)
#0 / 16105
Top 14%
Division (M18-39)
#0 / 5642
Top 32%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
19:25
Rank: #2139
Start → 5K
19:25 | 6:15/mi
10K· 6.21 mi
38:50
Rank: #2131 (+8)
5K → 10K
19:25 | 6:15/mi
15K· 9.32 mi
58:27
Rank: #2205 (-74)
10K → 15K
19:37 | 6:19/mi
20K· 12.43 mi
1:18:35
Rank: #2386 (-181)
15K → 20K
20:08 | 6:29/mi
Half· 13.11 mi
1:22:49
Rank: #2360 (+26)
20K → Half
4:14 | 6:12/mi
25K· 15.53 mi
1:38:09
Rank: #2280 (+80)
Half → 25K
15:20 | 6:19/mi
30K· 18.64 mi
1:58:28
Rank: #2203 (+77)
25K → 30K
20:19 | 6:32/mi
20M
2:07:28
Rank: #2189 (+14)
30K → 20M
9:00 | 6:37/mi
21M
2:14:41
Rank: #2213 (-24)
20M → 21M
7:13 | 7:13/mi
35K· 21.75 mi
2:20:11
Rank: #2329 (-116)
21M → 35K
5:30 | 7:21/mi
23M
2:28:34
Rank: #2306 (+23)
35K → 23M
8:23 | 6:42/mi
24M
2:35:03
Rank: #2279 (+27)
23M → 24M
6:29 | 6:29/mi
40K· 24.85 mi
2:40:43
Rank: #2237 (+42)
24M → 40K
5:40 | 6:38/mi
25.2M
2:43:28
Rank: #2281 (-44)
40K → 25.2M
2:45 | 7:58/mi
Finish· 26.22 mi
2:50:20
Rank: #2328 (-47)
25.2M → Finish
6:52 | 6:44/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:22:49
Pace6:19 /mi
2nd Half
Distance13.11 mi
Time1:27:31
Pace6:41 /mi
📊Positive Split: 5.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:20:1719:256:1519:25
6:15
-
10K
6.21 mi10:39:4238:506:1519:25
6:15
0:00
15K
9.32 mi10:59:1958:276:1619:37
6:19
+0:04
20K
12.43 mi11:19:271:18:356:1920:08
6:29
+0:10
Half
13.11 mi11:23:411:22:496:194:14
6:12
-0:17
25K
15.53 mi11:39:011:38:096:1915:20
6:19
+0:07
30K
18.64 mi11:59:201:58:286:2120:19
6:32
+0:13
20M
20.00 mi12:08:202:07:286:229:00
6:37
+0:05
21M
21.00 mi12:15:332:14:416:257:13
7:13
+0:36
35K
21.75 mi12:21:032:20:116:275:30
7:21
+0:08
23M
23.00 mi12:29:262:28:346:288:23
6:42
-0:39
24M
24.00 mi12:35:552:35:036:286:29
6:29
-0:13
40K
24.85 mi12:41:352:40:436:285:40
6:38
+0:09
25.2M
25.20 mi12:44:202:43:286:292:45
7:58
+1:20
Finish
26.22 mi12:51:122:50:206:306:52
6:44
-1:14

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

6:12 /mi

Average Pace

6:30 /mi

Slowest Pace

7:58 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

43:04

25% of race

Time at Steady Pace

1:51:48

66% of race

Time at Slower Pace

15:28

9% of race

Average Pace: 6:30 /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 mi10:20:1719:256:1519:25
6:15
#2139
10K
6.21 mi10:39:4238:506:1519:25
6:15
#2131
15K
9.32 mi10:59:1958:276:1619:37
6:19
#2205
20K
12.43 mi11:19:271:18:356:1920:08
6:29
#2386
Half
13.11 mi11:23:411:22:496:194:14
6:12
#2360
25K
15.53 mi11:39:011:38:096:1915:20
6:19
#2280
30K
18.64 mi11:59:201:58:286:2120:19
6:32
#2203
20M
20.00 mi12:08:202:07:286:229:00
6:37
#2189
21M
21.00 mi12:15:332:14:416:257:13
7:13
#2213
35K
21.75 mi12:21:032:20:116:275:30
7:21
#2329
23M
23.00 mi12:29:262:28:346:288:23
6:42
#2306
24M
24.00 mi12:35:552:35:036:286:29
6:29
#2279
40K
24.85 mi12:41:352:40:436:285:40
6:38
#2237
25.2M
25.20 mi12:44:202:43:286:292:45
7:58
#2281
Finish
26.22 mi12:51:122:50:206:306:52
6:44
#2328
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi2139204020402407(Top 8%)2297(Top 14%)2297(Top 41%)
10K6.21 mi3.10 mi2131+82033+72033+72145(Top 8%)2048(Top 13%)2048(Top 36%)
15K9.32 mi3.11 mi2205-742105-722105-722407(Top 8%)2297(Top 14%)2297(Top 41%)
20K12.43 mi3.11 mi2386-1812276-1712276-1712995(Top 11%)2849(Top 18%)2849(Top 50%)
Half13.11 mi0.68 mi2360+262251+252251+251998(Top 7%)1907(Top 12%)1907(Top 34%)
25K15.53 mi2.42 mi2280+802177+742177+741987(Top 7%)1891(Top 12%)1891(Top 34%)
30K18.64 mi3.11 mi2203+772100+772100+772149(Top 8%)2039(Top 13%)2039(Top 36%)
20M20.00 mi1.36 mi2189+142087+132087+132114(Top 7%)2001(Top 12%)2001(Top 35%)
21M21.00 mi1.00 mi2213-242111-242111-243183(Top 11%)2931(Top 18%)2931(Top 52%)
35K21.75 mi0.75 mi2329-1162219-1082219-1087485(Top 26%)5962(Top 37%)5962(Top 106%)
23M23.00 mi1.25 mi2306+232198+212198+212223(Top 8%)2074(Top 13%)2074(Top 37%)
24M24.00 mi1.00 mi2279+272169+292169+291966(Top 7%)1823(Top 11%)1823(Top 32%)
40K24.85 mi0.85 mi2237+422127+422127+422060(Top 7%)1898(Top 12%)1898(Top 34%)
25.2M25.20 mi0.35 mi2281-442168-412168-415705(Top 20%)4530(Top 28%)4530(Top 80%)
Finish26.22 mi1.02 mi2328-472208-402208-404083(Top 14%)3486(Top 22%)3486(Top 62%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 8%
×21stories
+97ft-345ft

Overall

2407

Males

2297

M18-39

2297

5K→10K

3.1 - 6.2 mi

Top 8%
×5stories
+79ft-138ft

Overall

2145

Males

2048

M18-39

2048

10K→15K

6.2 - 9.3 mi

Top 8%
×3stories
+67ft-78ft

Overall

2407

Males

2297

M18-39

2297

15K→20K

9.3 - 12.4 mi

Top 11%
×5stories
+106ft-86ft

Overall

2995

Males

2849

M18-39

2849

20K→Half

12.4 - 13.1 mi

Top 7%
×2stories
+19ft-37ft

Overall

1998

Males

1907

M18-39

1907

Half→25K

13.1 - 15.5 mi

Top 7%
×4stories
+66ft-88ft

Overall

1987

Males

1891

M18-39

1891

25K→30K

15.5 - 18.6 mi

Top 8%
×9stories
+181ft-148ft

Overall

2149

Males

2039

M18-39

2039

30K→20M

18.6 - 20.0 mi

Top 7%
×5stories
+64ft-50ft

Overall

2114

Males

2001

M18-39

2001

20M→21M

20.0 - 21.0 mi

Top 11%
×8stories
+106ft-24ft

Overall

3183

Males

2931

M18-39

2931

21M→35K

21.0 - 21.8 mi

Top 26%
×7stories
+17ft-86ft

Overall

7485

Males

5962

M18-39

5962

35K→23M

21.8 - 23.0 mi

Top 8%
×5stories
+23ft-63ft

Overall

2223

Males

2074

M18-39

2074

23M→24M

23.0 - 24.0 mi

Top 7%
×6stories
+12ft-82ft

Overall

1966

Males

1823

M18-39

1823

24M→40K

24.0 - 24.9 mi

Top 7%
×1story
+6ft-20ft

Overall

2060

Males

1898

M18-39

1898

40K→25.2M

24.9 - 25.2 mi

Top 20%
×1story
+13ft-16ft

Overall

5705

Males

4530

M18-39

4530

25.2M→Finish

25.2 - 26.2 mi

Top 14%
×2stories
+22ft-21ft

Overall

4083

Males

3486

M18-39

3486

Passing Analysis

Category:
Athletes Passed
721
Passed By
910
Net Change
-189
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#2139
5K → 10K124116+8#2139#2131
10K → 15K45119-74#2131#2205
15K → 20K30211-181#2205#2386
20K → Half304+26#2386#2360
Half → 25K9515+80#2360#2280
25K → 30K12245+77#2280#2203
30K → 20M4733+14#2203#2189
20M → 21M3660-24#2189#2213
21M → 35K8124-116#2213#2329
35K → 23M5330+23#2329#2306
23M → 24M5124+27#2306#2279
24M → 40K5311+42#2279#2237
40K → 25.2M751-44#2237#2281
25.2M → Finish2067-47#2281#2328
TOTALS721910-189
📊

Passing Visuals

Category:

📈Position Graph

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🎨Heatmap Timeline

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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