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MARINE CORPS MARATHON 2025

Shelby Harrington

Alexandria, VA

Bib: 34856 F

0:00
0:00
/ mi
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Overall
#0 / 30047
Gender (Female)
#0 / 12338
Division (F30-34)
#0 / 1621
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
12:17/mi
38:09
↑ 279↓ 1640.7%
140 ft elev
10K· 6.21 mi
11:40/mi
1:14:24
↑ 103↓ 2170.7%
25 ft elev
15K· 9.32 mi
12:46/mi
1:54:04
↑ 51↓ 55
21 ft elev
21K· 13.05 mi
11:46/mi
2:37:55
↑ 20↓ 37
4 ft elev
25K· 15.53 mi
11:49/mi
3:07:18
↑ 350.2%
30 ft elev
30K· 18.64 mi
12:23/mi
3:45:45
↑ 58↓ 57
30 ft elev
35K· 21.75 mi
12:03/mi
4:23:12
↑ 98↓ 92
36 ft elev
40K· 24.85 mi
13:17/mi
5:04:28
↑ 36↓ 530.1%
18 ft elev
Finish· 26.22 mi
13:33/mi
5:22:57
↑ 80↓ 240.8%
74 ft elev
Course Elevation
3–237 ft
≈
×20story building
•▲ 764 ft climb · ▼ 717 ft descent

The Course

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Half Splits

1st Half· via 21KFaster
Distance13.05 mi
Time2:37:55
Pace12:06 /mi
2nd Half
Distance13.17 mi
Time2:45:02
Pace12:32 /mi
📊Positive Split: 4.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi08:26:1438:0912:1738:09
12:17
-
10K
6.21 mi09:02:291:14:2411:5836:15
11:40
-0:37
15K
9.32 mi09:42:091:54:0412:1439:40
12:46
+1:06
21K
13.05 mi10:26:002:37:5512:0643:51
11:46
-1:00
25K
15.53 mi10:55:233:07:1812:0329:23
11:49
+0:03
30K
18.64 mi11:33:503:45:4512:0738:27
12:23
+0:34
35K
21.75 mi12:11:174:23:1212:0637:27
12:03
-0:20
40K
24.85 mi12:52:335:04:2812:1541:16
13:17
+1:14
Finish
26.22 mi13:11:025:22:5712:2018:29
13:33
+0:16

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

11:40 /mi

Average Pace

12:20 /mi

Slowest Pace

13:33 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

4:23:12

81% of race

Time at Steady Pace

59:45

19% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 12:19 /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 mi08:26:1438:0912:1738:09
12:17
#25208
10K
6.21 mi09:02:291:14:2411:5836:15
11:40
#25265
15K
9.32 mi09:42:091:54:0412:1439:40
12:46
#26016
21K
13.05 mi10:26:002:37:5512:0643:51
11:46
#24593
25K
15.53 mi10:55:233:07:1812:0329:23
11:49
#23811
30K
18.64 mi11:33:503:45:4512:0738:27
12:23
#22921
35K
21.75 mi12:11:174:23:1212:0637:27
12:03
#21890
40K
24.85 mi12:52:335:04:2812:1541:16
13:17
#21455
Finish
26.22 mi13:11:025:22:5712:2018:29
13:33
#21386
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF30-34Seg. OverallSeg. FemalesSeg. F30-34
5K3.11 mi3.11 mi252089567134627226(Top 91%)10662(Top 86%)1453(Top 90%)
10K6.21 mi3.10 mi25265-579604-371353-725325(Top 84%)9646(Top 78%)1350(Top 84%)
15K9.32 mi3.11 mi26016-7519978-3741401-4827226(Top 91%)10662(Top 86%)1453(Top 90%)
21K13.05 mi3.73 mi24593+14239272+7061311+9021575(Top 72%)7862(Top 64%)1120(Top 69%)
25K15.53 mi2.48 mi23811+7828943+3291266+4521087(Top 70%)7884(Top 64%)1139(Top 71%)
30K18.64 mi3.11 mi22921+8908581+3621223+4319752(Top 66%)7420(Top 60%)1068(Top 66%)
35K21.75 mi3.11 mi21890+10318192+3891171+5216855(Top 56%)6461(Top 52%)936(Top 58%)
40K24.85 mi3.10 mi21455+4358088+1041157+1419191(Top 64%)7669(Top 62%)1072(Top 66%)
Finish26.22 mi1.37 mi21386+698095-71163-620842(Top 69%)8361(Top 68%)1200(Top 74%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 91%
×18story building
+279ft-164ft

Overall

27226

Females

10662

F30-34

10662

5K→10K

3.1 - 6.2 mi

Top 84%
×11story building
+103ft-217ft

Overall

25325

Females

9646

F30-34

9646

10K→15K

6.2 - 9.3 mi

Top 91%
×3story building
+51ft-55ft

Overall

27226

Females

10662

F30-34

10662

15K→21K

9.3 - 13.1 mi

Top 72%
×1story
+20ft-37ft

Overall

21575

Females

7862

F30-34

7862

21K→25K

13.1 - 15.5 mi

Top 70%
×2story building
+35ft-8ft

Overall

21087

Females

7884

F30-34

7884

25K→30K

15.5 - 18.6 mi

Top 66%
×2story building
+58ft-57ft

Overall

19752

Females

7420

F30-34

7420

30K→35K

18.6 - 21.8 mi

Top 56%
×2story building
+98ft-92ft

Overall

16855

Females

6461

F30-34

6461

35K→40K

21.8 - 24.9 mi

Top 64%
×2story building
+36ft-53ft

Overall

19191

Females

7669

F30-34

7669

40K→Finish

24.9 - 26.2 mi

Top 69%
×5story building
+80ft-24ft

Overall

20842

Females

8361

F30-34

8361

Passing Analysis

Category:
Athletes Passed
5445*
Passed By
1623
Net Change
+3822
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#25208
5K → 10K350*407-57#25208#25265
10K → 15K156*907-751#25265#26016
15K → 21K1448*25+1423#26016#24593
21K → 25K819*37+782#24593#23811
25K → 30K926*36+890#23811#22921
30K → 35K1046*15+1031#22921#21890
35K → 40K536*101+435#21890#21455
40K → Finish164*95+69#21455#21386
TOTALS5445*1623+3822

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

📊

Passing Visuals

Category:
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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

U.S. Marine Corps Community Services (MCCS)

Timing Productions