Boston Marathon logo
BOSTON MARATHON 2025

Justin Leduc

Bib: 31422•M

MA

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 28404
Gender (Male)
#0 / 16105
Division (M18-39)
#0 / 5642
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
9:50/mi
30:34
↑ 97↓ 3451.5%
10K· 6.21 mi
10:07/mi
1:01:59
↑ 79↓ 1380.4%
15K· 9.32 mi
9:57/mi
1:32:55
↑ 67↓ 78
20K· 12.43 mi
9:43/mi
2:03:05
↑ 106↓ 860.1%
Half· 13.11 mi
9:26/mi
2:09:31
↑ 19↓ 370.5%
25K· 15.53 mi
10:09/mi
2:34:08
↑ 66↓ 880.2%
30K· 18.64 mi
9:42/mi
3:04:17
↑ 181↓ 1480.2%
20M
9:46/mi
3:17:33
↑ 64↓ 500.2%
21M
10:29/mi
3:28:02
↑ 106↓ 241.6%
35K· 21.75 mi
9:27/mi
3:35:06
↑ 17↓ 861.7%
23M
9:05/mi
3:46:29
↑ 23↓ 630.6%
24M
8:40/mi
3:55:09
↓ 821.3%
40K· 24.85 mi
8:47/mi
4:02:40
↓ 200.3%
25.2M
9:34/mi
4:05:58
↑ 13↓ 160.2%
Finish· 26.22 mi
8:22/mi
4:14:30
↑ 22↓ 21

The Course

Is this your race?

Claim it — unlock a deeper AI report on this race, free

A personalized Race Performance Report that goes beyond this page — emailed to you, built from your real splits.

Half Splits

1st Half· via Half
Distance13.11 mi
Time2:09:31
Pace9:53 /mi
2nd Half✓ Faster
Distance13.11 mi
Time2:04:59
Pace9:32 /mi
📊Negative Split: 3.5% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:53:4630:349:5030:34
9:50
-
10K
6.21 mi12:25:111:01:599:5931:25
10:07
+0:17
15K
9.32 mi12:56:071:32:559:5830:56
9:57
-0:10
20K
12.43 mi13:26:172:03:059:5430:10
9:43
-0:14
Half
13.11 mi13:32:432:09:319:536:26
9:26
-0:17
25K
15.53 mi13:57:202:34:089:5524:37
10:09
+0:43
30K
18.64 mi14:27:293:04:179:5330:09
9:42
-0:27
20M
20.00 mi14:40:453:17:339:5313:16
9:46
+0:04
21M
21.00 mi14:51:143:28:029:5410:29
10:29
+0:43
35K
21.75 mi14:58:183:35:069:537:04
9:27
-1:02
23M
23.00 mi15:09:413:46:299:5111:23
9:05
-0:22
24M
24.00 mi15:18:213:55:099:488:40
8:40
-0:25
40K
24.85 mi15:25:524:02:409:467:31
8:47
+0:07
25.2M
25.20 mi15:29:104:05:589:463:18
9:34
+0:47
Finish
26.22 mi15:37:424:14:309:438:32
8:22
-1:12

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

8:22 /mi

Average Pace

9:43 /mi

Slowest Pace

10:29 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

36:06

14% of race

Time at Steady Pace

2:31:53

60% of race

Time at Slower Pace

1:06:31

26% of race

Average Pace: 9:42 /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 mi11:53:4630:349:5030:34
9:50
#25170
10K
6.21 mi12:25:111:01:599:5931:25
10:07
#25370
15K
9.32 mi12:56:071:32:559:5830:56
9:57
#25207
20K
12.43 mi13:26:172:03:059:5430:10
9:43
#24765
Half
13.11 mi13:32:432:09:319:536:26
9:26
#24697
25K
15.53 mi13:57:202:34:089:5524:37
10:09
#24547
30K
18.64 mi14:27:293:04:179:5330:09
9:42
#23912
20M
20.00 mi14:40:453:17:339:5313:16
9:46
#23660
21M
21.00 mi14:51:143:28:029:5410:29
10:29
#23457
35K
21.75 mi14:58:183:35:069:537:04
9:27
#23332
23M
23.00 mi15:09:413:46:299:5111:23
9:05
#23043
24M
24.00 mi15:18:213:55:099:488:40
8:40
#22770
40K
24.85 mi15:25:524:02:409:467:31
8:47
#22577
25.2M
25.20 mi15:29:104:05:589:463:18
9:34
#22478
Finish
26.22 mi15:37:424:14:309:438:32
8:22
#22292
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi25170148061480624912(Top 88%)14680(Top 91%)14680(Top 260%)
10K6.21 mi3.10 mi25370-20014871-6514871-6525554(Top 90%)14933(Top 93%)14933(Top 265%)
15K9.32 mi3.11 mi25207+16314804+6714804+6724912(Top 88%)14680(Top 91%)14680(Top 260%)
20K12.43 mi3.11 mi24765+44214598+20614598+20623514(Top 83%)14021(Top 87%)14021(Top 249%)
Half13.11 mi0.68 mi24697+6814565+3314565+3323331(Top 82%)13931(Top 87%)13931(Top 247%)
25K15.53 mi2.42 mi24547+15014479+8614479+8623608(Top 83%)14013(Top 87%)14013(Top 248%)
30K18.64 mi3.11 mi23912+63514167+31214167+31220706(Top 73%)12599(Top 78%)12599(Top 223%)
20M20.00 mi1.36 mi23660+25214021+14614021+14620166(Top 71%)12225(Top 76%)12225(Top 217%)
21M21.00 mi1.00 mi23457+20313918+10313918+10319946(Top 70%)12019(Top 75%)12019(Top 213%)
35K21.75 mi0.75 mi23332+12513854+6413854+6420141(Top 71%)12044(Top 75%)12044(Top 213%)
23M23.00 mi1.25 mi23043+28913696+15813696+15816769(Top 59%)10418(Top 65%)10418(Top 185%)
24M24.00 mi1.00 mi22770+27313556+14013556+14015546(Top 55%)9849(Top 61%)9849(Top 175%)
40K24.85 mi0.85 mi22577+19313446+11013446+11015142(Top 53%)9518(Top 59%)9518(Top 169%)
25.2M25.20 mi0.35 mi22478+9913389+5713389+5714952(Top 53%)9409(Top 58%)9409(Top 167%)
Finish26.22 mi1.02 mi22292+18613292+9713292+9715388(Top 54%)9668(Top 60%)9668(Top 171%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 88%
×21story building
+97ft-345ft

Overall

24912

Males

14680

M18-39

14680

5K→10K

3.1 - 6.2 mi

Top 90%
×5story building
+79ft-138ft

Overall

25554

Males

14933

M18-39

14933

10K→15K

6.2 - 9.3 mi

Top 88%
×3story building
+67ft-78ft

Overall

24912

Males

14680

M18-39

14680

15K→20K

9.3 - 12.4 mi

Top 83%
×5story building
+106ft-86ft

Overall

23514

Males

14021

M18-39

14021

20K→Half

12.4 - 13.1 mi

Top 82%
×2story building
+19ft-37ft

Overall

23331

Males

13931

M18-39

13931

Half→25K

13.1 - 15.5 mi

Top 83%
×4story building
+66ft-88ft

Overall

23608

Males

14013

M18-39

14013

25K→30K

15.5 - 18.6 mi

Top 73%
×9story building
+181ft-148ft

Overall

20706

Males

12599

M18-39

12599

30K→20M

18.6 - 20.0 mi

Top 71%
×5story building
+64ft-50ft

Overall

20166

Males

12225

M18-39

12225

20M→21M

20.0 - 21.0 mi

Top 70%
×8story building
+106ft-24ft

Overall

19946

Males

12019

M18-39

12019

21M→35K

21.0 - 21.8 mi

Top 71%
×7story building
+17ft-86ft

Overall

20141

Males

12044

M18-39

12044

35K→23M

21.8 - 23.0 mi

Top 59%
×5story building
+23ft-63ft

Overall

16769

Males

10418

M18-39

10418

23M→24M

23.0 - 24.0 mi

Top 55%
×6story building
+12ft-82ft

Overall

15546

Males

9849

M18-39

9849

24M→40K

24.0 - 24.9 mi

Top 53%
×1story
+6ft-20ft

Overall

15142

Males

9518

M18-39

9518

40K→25.2M

24.9 - 25.2 mi

Top 53%
×1story
+13ft-16ft

Overall

14952

Males

9409

M18-39

9409

25.2M→Finish

25.2 - 26.2 mi

Top 54%
×2story building
+22ft-21ft

Overall

15388

Males

9668

M18-39

9668

Passing Analysis

Category:
Athletes Passed
3311
Passed By
433
Net Change
+2878
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#25170
5K → 10K115315-200#25170#25370
10K → 15K22764+163#25370#25207
15K → 20K4453+442#25207#24765
20K → Half735+68#24765#24697
Half → 25K17828+150#24697#24547
25K → 30K6383+635#24547#23912
30K → 20M2553+252#23912#23660
20M → 21M2096+203#23660#23457
21M → 35K1294+125#23457#23332
35K → 23M2901+289#23332#23043
23M → 24M2730+273#23043#22770
24M → 40K1941+193#22770#22577
40K → 25.2M990+99#22577#22478
25.2M → Finish1860+186#22478#22292
TOTALS3311433+2878
📊

Passing Visuals

Category:
Loading...

🔄Passing Circle

Loading...

🌊Position Flow

Loading...

🏃Race Lanes

Loading...

Upload your GPX file

Supports Garmin, Apple Watch, Polar, Suunto, COROS, Strava, and other apps

.gpx files up to 10MB

Export Track Data

Download your race performance as a GPX or TCX file to import into Strava, Garmin Connect, or other fitness apps.

Questions or issues regarding timing data?

If you notice any discrepancies in your timing data or have questions about your results, our support team can help.

Contact Race Support

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing