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BOSTON MARATHON 2025

Justin Choi

Bib: 5401•M

NY

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 34%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
19:35
Rank: #2466
Start → 5K
19:35 | 6:18/mi
10K· 6.21 mi
39:31
Rank: #2794 (-328)
5K → 10K
19:56 | 6:25/mi
15K· 9.32 mi
59:38
Rank: #2996 (-202)
10K → 15K
20:07 | 6:28/mi
20K· 12.43 mi
1:20:00
Rank: #3094 (-98)
15K → 20K
20:22 | 6:33/mi
Half· 13.11 mi
1:24:18
Rank: #3063 (+31)
20K → Half
4:18 | 6:18/mi
25K· 15.53 mi
1:40:07
Rank: #3021 (+42)
Half → 25K
15:49 | 6:31/mi
30K· 18.64 mi
2:00:55
Rank: #2956 (+65)
25K → 30K
20:48 | 6:42/mi
20M
2:10:10
Rank: #2928 (+28)
30K → 20M
9:15 | 6:48/mi
21M
2:17:15
Rank: #2881 (+47)
20M → 21M
7:05 | 7:05/mi
35K· 21.75 mi
2:22:00
Rank: #2804 (+77)
21M → 35K
4:45 | 6:21/mi
23M
2:30:23
Rank: #2736 (+68)
35K → 23M
8:23 | 6:42/mi
24M
2:36:51
Rank: #2648 (+88)
23M → 24M
6:28 | 6:28/mi
40K· 24.85 mi
2:42:21
Rank: #2562 (+86)
24M → 40K
5:30 | 6:26/mi
25.2M
2:44:44
Rank: #2522 (+40)
40K → 25.2M
2:23 | 6:55/mi
Finish· 26.22 mi
2:51:07
Rank: #2465 (+57)
25.2M → Finish
6:23 | 6:16/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:24:18
Pace6:26 /mi
2nd Half
Distance13.11 mi
Time1:26:49
Pace6:37 /mi
📊Positive Split: 3.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:22:5319:356:1819:35
6:18
-
10K
6.21 mi10:42:4939:316:2219:56
6:25
+0:07
15K
9.32 mi11:02:5659:386:2420:07
6:28
+0:03
20K
12.43 mi11:23:181:20:006:2620:22
6:33
+0:05
Half
13.11 mi11:27:361:24:186:264:18
6:18
-0:15
25K
15.53 mi11:43:251:40:076:2715:49
6:31
+0:13
30K
18.64 mi12:04:132:00:556:2920:48
6:42
+0:11
20M
20.00 mi12:13:282:10:106:309:15
6:48
+0:06
21M
21.00 mi12:20:332:17:156:327:05
7:05
+0:17
35K
21.75 mi12:25:182:22:006:324:45
6:21
-0:44
23M
23.00 mi12:33:412:30:236:328:23
6:42
+0:21
24M
24.00 mi12:40:092:36:516:326:28
6:28
-0:14
40K
24.85 mi12:45:392:42:216:325:30
6:26
-0:02
25.2M
25.20 mi12:48:022:44:446:322:23
6:55
+0:29
Finish
26.22 mi12:54:252:51:076:326:23
6:16
-0:39

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

6:16 /mi

Average Pace

6:32 /mi

Slowest Pace

7:05 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:41:39

94% of race

Time at Steady Pace

9:28

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:32 /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 mi10:22:5319:356:1819:35
6:18
#2466
10K
6.21 mi10:42:4939:316:2219:56
6:25
#2794
15K
9.32 mi11:02:5659:386:2420:07
6:28
#2996
20K
12.43 mi11:23:181:20:006:2620:22
6:33
#3094
Half
13.11 mi11:27:361:24:186:264:18
6:18
#3063
25K
15.53 mi11:43:251:40:076:2715:49
6:31
#3021
30K
18.64 mi12:04:132:00:556:2920:48
6:42
#2956
20M
20.00 mi12:13:282:10:106:309:15
6:48
#2928
21M
21.00 mi12:20:332:17:156:327:05
7:05
#2881
35K
21.75 mi12:25:182:22:006:324:45
6:21
#2804
23M
23.00 mi12:33:412:30:236:328:23
6:42
#2736
24M
24.00 mi12:40:092:36:516:326:28
6:28
#2648
40K
24.85 mi12:45:392:42:216:325:30
6:26
#2562
25.2M
25.20 mi12:48:022:44:446:322:23
6:55
#2522
Finish
26.22 mi12:54:252:51:076:326:23
6:16
#2465
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi2466234923493414(Top 12%)3238(Top 20%)3238(Top 57%)
10K6.21 mi3.10 mi2794-3282661-3122661-3123156(Top 11%)3004(Top 19%)3004(Top 53%)
15K9.32 mi3.11 mi2996-2022855-1942855-1943414(Top 12%)3238(Top 20%)3238(Top 57%)
20K12.43 mi3.11 mi3094-982949-942949-943453(Top 12%)3271(Top 20%)3271(Top 58%)
Half13.11 mi0.68 mi3063+312921+282921+282564(Top 9%)2453(Top 15%)2453(Top 43%)
25K15.53 mi2.42 mi3021+422879+422879+423018(Top 11%)2868(Top 18%)2868(Top 51%)
30K18.64 mi3.11 mi2956+652816+632816+632866(Top 10%)2707(Top 17%)2707(Top 48%)
20M20.00 mi1.36 mi2928+282786+302786+302974(Top 10%)2773(Top 17%)2773(Top 49%)
21M21.00 mi1.00 mi2881+472740+462740+462615(Top 9%)2437(Top 15%)2437(Top 43%)
35K21.75 mi0.75 mi2804+772666+742666+741842(Top 6%)1731(Top 11%)1731(Top 31%)
23M23.00 mi1.25 mi2736+682599+672599+672245(Top 8%)2096(Top 13%)2096(Top 37%)
24M24.00 mi1.00 mi2648+882514+852514+851927(Top 7%)1789(Top 11%)1789(Top 32%)
40K24.85 mi0.85 mi2562+862430+842430+841397(Top 5%)1298(Top 8%)1298(Top 23%)
25.2M25.20 mi0.35 mi2522+402391+392391+391275(Top 4%)1177(Top 7%)1177(Top 21%)
Finish26.22 mi1.02 mi2465+572336+552336+551770(Top 6%)1640(Top 10%)1640(Top 29%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 12%
×21stories
+97ft-345ft

Overall

3414

Males

3238

M18-39

3238

5K→10K

3.1 - 6.2 mi

Top 11%
×5stories
+79ft-138ft

Overall

3156

Males

3004

M18-39

3004

10K→15K

6.2 - 9.3 mi

Top 12%
×3stories
+67ft-78ft

Overall

3414

Males

3238

M18-39

3238

15K→20K

9.3 - 12.4 mi

Top 12%
×5stories
+106ft-86ft

Overall

3453

Males

3271

M18-39

3271

20K→Half

12.4 - 13.1 mi

Top 9%
×2stories
+19ft-37ft

Overall

2564

Males

2453

M18-39

2453

Half→25K

13.1 - 15.5 mi

Top 11%
×4stories
+66ft-88ft

Overall

3018

Males

2868

M18-39

2868

25K→30K

15.5 - 18.6 mi

Top 10%
×9stories
+181ft-148ft

Overall

2866

Males

2707

M18-39

2707

30K→20M

18.6 - 20.0 mi

Top 10%
×5stories
+64ft-50ft

Overall

2974

Males

2773

M18-39

2773

20M→21M

20.0 - 21.0 mi

Top 9%
×8stories
+106ft-24ft

Overall

2615

Males

2437

M18-39

2437

21M→35K

21.0 - 21.8 mi

Top 6%
×7stories
+17ft-86ft

Overall

1842

Males

1731

M18-39

1731

35K→23M

21.8 - 23.0 mi

Top 8%
×5stories
+23ft-63ft

Overall

2245

Males

2096

M18-39

2096

23M→24M

23.0 - 24.0 mi

Top 7%
×6stories
+12ft-82ft

Overall

1927

Males

1789

M18-39

1789

24M→40K

24.0 - 24.9 mi

Top 5%
×1story
+6ft-20ft

Overall

1397

Males

1298

M18-39

1298

40K→25.2M

24.9 - 25.2 mi

Top 4%
×1story
+13ft-16ft

Overall

1275

Males

1177

M18-39

1177

25.2M→Finish

25.2 - 26.2 mi

Top 6%
×2stories
+22ft-21ft

Overall

1770

Males

1640

M18-39

1640

Passing Analysis

Category:
Athletes Passed
964
Passed By
963
Net Change
+1
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#2466
5K → 10K30358-328#2466#2794
10K → 15K31233-202#2794#2996
15K → 20K57155-98#2996#3094
20K → Half354+31#3094#3063
Half → 25K7735+42#3063#3021
25K → 30K14479+65#3021#2956
30K → 20M6941+28#2956#2928
20M → 21M6720+47#2928#2881
21M → 35K803+77#2881#2804
35K → 23M8517+68#2804#2736
23M → 24M968+88#2736#2648
24M → 40K871+86#2648#2562
40K → 25.2M411+40#2562#2522
25.2M → Finish658+57#2522#2465
TOTALS964963+1
📊

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