Marine Corps Marathon logo
MARINE CORPS MARATHON 2025

Anton Jr. Semelroth

Stafford, VA

Bib: 14092 M

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 30047
Gender (Male)
#0 / 17709
Division (M14-19)
#0 / 212
Race Day Weather
42°/32°F
broken clouds

⏱️ Race Timeline

Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
27 ft elev
5K· 3.11 mi
10:15/mi
31:52
↑ 279↓ 1640.7%
140 ft elev
10K· 6.21 mi
9:48/mi
1:02:20
↑ 103↓ 2170.7%
25 ft elev
15K· 9.32 mi
10:51/mi
1:36:04
↑ 51↓ 55
21 ft elev
21K· 13.05 mi
10:16/mi
2:14:22
↑ 20↓ 37
4 ft elev
25K· 15.53 mi
10:01/mi
2:39:16
↑ 350.2%
30 ft elev
30K· 18.64 mi
12:00/mi
3:16:34
↑ 58↓ 57
30 ft elev
35K· 21.75 mi
13:03/mi
3:57:08
↑ 98↓ 92
36 ft elev
40K· 24.85 mi
13:31/mi
4:39:08
↑ 36↓ 530.1%
18 ft elev
Finish· 26.22 mi
13:02/mi
4:56:55
↑ 80↓ 240.8%
74 ft elev
Course Elevation
3–237 ft
≈
×20story building
•▲ 764 ft climb · ▼ 717 ft descent

The Course

Is this your race?

Claim it for a free AI report

A coach's-eye read of your race — emailed to you, free.

Half Splits

1st Half· via 21KFaster
Distance13.05 mi
Time2:14:22
Pace10:18 /mi
2nd Half
Distance13.17 mi
Time2:42:33
Pace12:21 /mi
📊Positive Split: 21.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi08:08:3031:5210:1531:52
10:15
-
10K
6.21 mi08:38:581:02:2010:0230:28
9:48
-0:27
15K
9.32 mi09:12:421:36:0410:1833:44
10:51
+1:03
21K
13.05 mi09:51:002:14:2210:1838:18
10:16
-0:35
25K
15.53 mi10:15:542:39:1610:1524:54
10:01
-0:15
30K
18.64 mi10:53:123:16:3410:3337:18
12:00
+1:59
35K
21.75 mi11:33:463:57:0810:5440:34
13:03
+1:03
40K
24.85 mi12:15:464:39:0811:1442:00
13:31
+0:28
Finish
26.22 mi12:33:334:56:5511:2017:47
13:02
-0:29

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

9:48 /mi

Average Pace

11:20 /mi

Slowest Pace

13:31 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

55:22

19% of race

Time at Steady Pace

1:43:54

35% of race

Time at Slower Pace

2:17:39

46% of race

Average Pace: 11:19 /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 mi08:08:3031:5210:1531:52
10:15
#13238
10K
6.21 mi08:38:581:02:2010:0230:28
9:48
#13798
15K
9.32 mi09:12:421:36:0410:1833:44
10:51
#15848
21K
13.05 mi09:51:002:14:2210:1838:18
10:16
#15282
25K
15.53 mi10:15:542:39:1610:1524:54
10:01
#14832
30K
18.64 mi10:53:123:16:3410:3337:18
12:00
#15631
35K
21.75 mi11:33:463:57:0810:5440:34
13:03
#16569
40K
24.85 mi12:15:464:39:0811:1442:00
13:31
#17222
Finish
26.22 mi12:33:334:56:5511:2017:47
13:02
#17405
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM14-19Seg. OverallSeg. MalesSeg. M14-19
5K3.11 mi3.11 mi13238924812719930(Top 66%)12951(Top 73%)162(Top 77%)
10K6.21 mi3.10 mi13798-5609583-335132-514419(Top 48%)9963(Top 56%)135(Top 64%)
15K9.32 mi3.11 mi15848-205010761-1178141-919930(Top 66%)12951(Top 73%)162(Top 77%)
21K13.05 mi3.73 mi15282+56610433+328133+814627(Top 49%)9999(Top 56%)122(Top 58%)
25K15.53 mi2.48 mi14832+45010109+324130+313657(Top 45%)9262(Top 52%)110(Top 52%)
30K18.64 mi3.11 mi15631-79910464-35513018547(Top 62%)11691(Top 66%)141(Top 67%)
35K21.75 mi3.11 mi16569-93810845-381134-420060(Top 67%)12125(Top 68%)138(Top 66%)
40K24.85 mi3.10 mi17222-65311074-22913419910(Top 66%)11928(Top 67%)138(Top 66%)
Finish26.22 mi1.37 mi17405-18311132-58135-119301(Top 64%)11615(Top 66%)148(Top 70%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 66%
×18story building
+279ft-164ft

Overall

19930

Males

12951

M14-19

12951

5K→10K

3.1 - 6.2 mi

Top 48%
×11story building
+103ft-217ft

Overall

14419

Males

9963

M14-19

9963

10K→15K

6.2 - 9.3 mi

Top 66%
×3story building
+51ft-55ft

Overall

19930

Males

12951

M14-19

12951

15K→21K

9.3 - 13.1 mi

Top 49%
×1story
+20ft-37ft

Overall

14627

Males

9999

M14-19

9999

21K→25K

13.1 - 15.5 mi

Top 45%
×2story building
+35ft-8ft

Overall

13657

Males

9262

M14-19

9262

25K→30K

15.5 - 18.6 mi

Top 62%
×2story building
+58ft-57ft

Overall

18547

Males

11691

M14-19

11691

30K→35K

18.6 - 21.8 mi

Top 67%
×2story building
+98ft-92ft

Overall

20060

Males

12125

M14-19

12125

35K→40K

21.8 - 24.9 mi

Top 66%
×2story building
+36ft-53ft

Overall

19910

Males

11928

M14-19

11928

40K→Finish

24.9 - 26.2 mi

Top 64%
×5story building
+80ft-24ft

Overall

19301

Males

11615

M14-19

11615

Passing Analysis

Category:
Athletes Passed
1965*
Passed By
6132
Net Change
-4167
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#13238
5K → 10K195*755-560#13238#13798
10K → 15K39*2089-2050#13798#15848
15K → 21K684*118+566#15848#15282
21K → 25K523*73+450#15282#14832
25K → 30K160*959-799#14832#15631
30K → 35K143*1081-938#15631#16569
35K → 40K152*805-653#16569#17222
40K → Finish69*252-183#17222#17405
TOTALS1965*6132-4167

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

📊

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

U.S. Marine Corps Community Services (MCCS)

Timing Productions