Marine Corps Marathon logo
MARINE CORPS MARATHON 2025

Cory Southall

Fairfax Sta, VA

Bib: 23923 M

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 30047
Top 26%
Gender (Male)
#0 / 17709
Top 32%
Division (M35-39)
#0 / 2420
Top 35%
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
10:02/mi
31:11
↑ 279↓ 1640.7%
140 ft elev
10K· 6.21 mi
9:28/mi
1:00:36
↑ 103↓ 2170.7%
25 ft elev
15K· 9.32 mi
9:37/mi
1:30:29
↑ 51↓ 55
21 ft elev
21K· 13.05 mi
9:54/mi
2:07:22
↑ 20↓ 37
4 ft elev
25K· 15.53 mi
9:00/mi
2:29:45
↑ 350.2%
30 ft elev
30K· 18.64 mi
8:58/mi
2:57:38
↑ 58↓ 57
30 ft elev
35K· 21.75 mi
8:38/mi
3:24:27
↑ 98↓ 92
36 ft elev
40K· 24.85 mi
9:14/mi
3:53:08
↑ 36↓ 530.1%
18 ft elev
Finish· 26.22 mi
9:47/mi
4:06:29
↑ 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 on this race

A one-of-a-kind AI Race Performance Report that reads your race like a coach. A plain-English story of how you raced, where you surged and faded, and what it all means. Emailed to you, free.

Half Splits

1st Half· via 21K
Distance13.05 mi
Time2:07:22
Pace9:46 /mi
2nd Half✓ Faster
Distance13.17 mi
Time1:59:07
Pace9:03 /mi
📊Negative Split: 6.5% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi08:19:2531:1110:0231:11
10:02
-
10K
6.21 mi08:48:501:00:369:4529:25
9:28
-0:34
15K
9.32 mi09:18:431:30:299:4229:53
9:37
+0:09
21K
13.05 mi09:55:362:07:229:4636:53
9:54
+0:17
25K
15.53 mi10:17:592:29:459:3822:23
9:00
-0:54
30K
18.64 mi10:45:522:57:389:3227:53
8:58
-0:02
35K
21.75 mi11:12:413:24:279:2426:49
8:38
-0:20
40K
24.85 mi11:41:223:53:089:2328:41
9:14
+0:36
Finish
26.22 mi11:54:434:06:299:2413:21
9:47
+0:33

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

8:38 /mi

Average Pace

9:24 /mi

Slowest Pace

10:02 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:15:11

55% of race

Time at Steady Pace

1:51:18

45% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 9:24 /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 mi08:19:2531:1110:0231:11
10:02
#11860
10K
6.21 mi08:48:501:00:369:4529:25
9:28
#12099
15K
9.32 mi09:18:431:30:299:4229:53
9:37
#12228
21K
13.05 mi09:55:362:07:229:4636:53
9:54
#12265
25K
15.53 mi10:17:592:29:459:3822:23
9:00
#11508
30K
18.64 mi10:45:522:57:389:3227:53
8:58
#10336
35K
21.75 mi11:12:413:24:279:2426:49
8:38
#8936
40K
24.85 mi11:41:223:53:089:2328:41
9:14
#8099
Finish
26.22 mi11:54:434:06:299:2413:21
9:47
#7950
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM35-39Seg. OverallSeg. MalesSeg. M35-39
5K3.11 mi3.11 mi118608426124712623(Top 42%)8888(Top 50%)1303(Top 54%)
10K6.21 mi3.10 mi12099-2398592-1661272-2512406(Top 41%)8795(Top 50%)1296(Top 54%)
15K9.32 mi3.11 mi12228-1298674-821285-1312623(Top 42%)8888(Top 50%)1303(Top 54%)
21K13.05 mi3.73 mi12265-378659+151269+1612680(Top 42%)8856(Top 50%)1286(Top 53%)
25K15.53 mi2.48 mi11508+7578191+4681199+708839(Top 29%)6455(Top 36%)945(Top 39%)
30K18.64 mi3.11 mi10336+11727420+7711085+1145887(Top 20%)4408(Top 25%)653(Top 27%)
35K21.75 mi3.11 mi8936+14006470+950946+1393611(Top 12%)2745(Top 16%)424(Top 18%)
40K24.85 mi3.10 mi8099+8375842+628869+774961(Top 17%)3492(Top 20%)516(Top 21%)
Finish26.22 mi1.37 mi7950+1495718+124845+247116(Top 24%)4708(Top 27%)663(Top 27%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 42%
×18story building
+279ft-164ft

Overall

12623

Males

8888

M35-39

8888

5K→10K

3.1 - 6.2 mi

Top 41%
×11story building
+103ft-217ft

Overall

12406

Males

8795

M35-39

8795

10K→15K

6.2 - 9.3 mi

Top 42%
×3story building
+51ft-55ft

Overall

12623

Males

8888

M35-39

8888

15K→21K

9.3 - 13.1 mi

Top 42%
×1story
+20ft-37ft

Overall

12680

Males

8856

M35-39

8856

21K→25K

13.1 - 15.5 mi

Top 29%
×2story building
+35ft-8ft

Overall

8839

Males

6455

M35-39

6455

25K→30K

15.5 - 18.6 mi

Top 20%
×2story building
+58ft-57ft

Overall

5887

Males

4408

M35-39

4408

30K→35K

18.6 - 21.8 mi

Top 12%
×2story building
+98ft-92ft

Overall

3611

Males

2745

M35-39

2745

35K→40K

21.8 - 24.9 mi

Top 17%
×2story building
+36ft-53ft

Overall

4961

Males

3492

M35-39

3492

40K→Finish

24.9 - 26.2 mi

Top 24%
×5story building
+80ft-24ft

Overall

7116

Males

4708

M35-39

4708

Passing Analysis

Category:
Athletes Passed
5160*
Passed By
1250
Net Change
+3910
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#11860
5K → 10K265*504-239#11860#12099
10K → 15K214*343-129#12099#12228
15K → 21K301*338-37#12228#12265
21K → 25K768*11+757#12265#11508
25K → 30K1176*4+1172#11508#10336
30K → 35K1401*1+1400#10336#8936
35K → 40K852*15+837#8936#8099
40K → Finish183*34+149#8099#7950
TOTALS5160*1250+3910

* 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