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MARINE CORPS MARATHON 2025

Margaret Shields

Chevy Chase, MD

Bib: 8450 F

0:00
0:00
/ mi
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Overall
#0 / 30047
Top 3%
Gender (Female)
#0 / 12338
Top 1%
Division (F25-29)
#0 / 2322
Top 2%
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
7:39/mi
23:47
↑ 279↓ 1640.7%
140 ft elev
10K· 6.21 mi
7:05/mi
45:48
↑ 103↓ 2170.7%
25 ft elev
15K· 9.32 mi
7:07/mi
1:07:54
↑ 51↓ 55
21 ft elev
21K· 13.05 mi
7:18/mi
1:35:06
↑ 20↓ 37
4 ft elev
25K· 15.53 mi
7:04/mi
1:52:40
↑ 350.2%
30 ft elev
30K· 18.64 mi
7:25/mi
2:15:42
↑ 58↓ 57
30 ft elev
35K· 21.75 mi
7:40/mi
2:39:31
↑ 98↓ 92
36 ft elev
40K· 24.85 mi
7:49/mi
3:03:49
↑ 36↓ 530.1%
18 ft elev
Finish· 26.22 mi
7:43/mi
3:14:20
↑ 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
Time1:35:06
Pace7:17 /mi
2nd Half
Distance13.17 mi
Time1:39:13
Pace7:32 /mi
📊Positive Split: 4.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi07:50:2323:477:3923:47
7:39
-
10K
6.21 mi08:12:2445:487:2222:01
7:05
-0:34
15K
9.32 mi08:34:301:07:547:1722:06
7:07
+0:02
21K
13.05 mi09:01:421:35:067:1727:12
7:18
+0:11
25K
15.53 mi09:19:161:52:407:1517:34
7:04
-0:14
30K
18.64 mi09:42:182:15:427:1723:02
7:25
+0:21
35K
21.75 mi10:06:072:39:317:2023:49
7:40
+0:15
40K
24.85 mi10:30:253:03:497:2424:18
7:49
+0:09
Finish
26.22 mi10:40:563:14:207:2510:31
7:43
-0:06

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

7:04 /mi

Average Pace

7:25 /mi

Slowest Pace

7:49 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:50:02

87% of race

Time at Steady Pace

24:18

13% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:25 /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 mi07:50:2323:477:3923:47
7:39
#1206
10K
6.21 mi08:12:2445:487:2222:01
7:05
#1158
15K
9.32 mi08:34:301:07:547:1722:06
7:07
#1106
21K
13.05 mi09:01:421:35:067:1727:12
7:18
#1089
25K
15.53 mi09:19:161:52:407:1517:34
7:04
#1072
30K
18.64 mi09:42:182:15:427:1723:02
7:25
#1040
35K
21.75 mi10:06:072:39:317:2023:49
7:40
#1029
40K
24.85 mi10:30:253:03:497:2424:18
7:49
#1010
Finish
26.22 mi10:40:563:14:207:2510:31
7:43
#981
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF25-29Seg. OverallSeg. FemalesSeg. F25-29
5K3.11 mi3.11 mi1206158421053(Top 4%)120(Top 1.0%)29(Top 1%)
10K6.21 mi3.10 mi1158+48139+1935+71095(Top 4%)124(Top 1%)34(Top 1%)
15K9.32 mi3.11 mi1106+52131+833+21053(Top 4%)120(Top 1.0%)29(Top 1%)
21K13.05 mi3.73 mi1089+17127+431+21098(Top 4%)124(Top 1%)30(Top 1%)
25K15.53 mi2.48 mi1072+17122+529+21045(Top 3%)120(Top 1.0%)30(Top 1%)
30K18.64 mi3.11 mi1040+32119+3291100(Top 4%)157(Top 1%)43(Top 2%)
35K21.75 mi3.11 mi1029+11124-531-21214(Top 4%)200(Top 2%)60(Top 3%)
40K24.85 mi3.10 mi1010+19134-1037-61248(Top 4%)246(Top 2%)73(Top 3%)
Finish26.22 mi1.37 mi981+29133+1371046(Top 3%)199(Top 2%)60(Top 3%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 4%
×18story building
+279ft-164ft

Overall

1053

Females

120

F25-29

120

5K→10K

3.1 - 6.2 mi

Top 4%
×11story building
+103ft-217ft

Overall

1095

Females

124

F25-29

124

10K→15K

6.2 - 9.3 mi

Top 4%
×3story building
+51ft-55ft

Overall

1053

Females

120

F25-29

120

15K→21K

9.3 - 13.1 mi

Top 4%
×1story
+20ft-37ft

Overall

1098

Females

124

F25-29

124

21K→25K

13.1 - 15.5 mi

Top 3%
×2story building
+35ft-8ft

Overall

1045

Females

120

F25-29

120

25K→30K

15.5 - 18.6 mi

Top 4%
×2story building
+58ft-57ft

Overall

1100

Females

157

F25-29

157

30K→35K

18.6 - 21.8 mi

Top 4%
×2story building
+98ft-92ft

Overall

1214

Females

200

F25-29

200

35K→40K

21.8 - 24.9 mi

Top 4%
×2story building
+36ft-53ft

Overall

1248

Females

246

F25-29

246

40K→Finish

24.9 - 26.2 mi

Top 3%
×5story building
+80ft-24ft

Overall

1046

Females

199

F25-29

199

Passing Analysis

Category:
Athletes Passed
429*
Passed By
204
Net Change
+225
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#1206
5K → 10K8941+48#1206#1158
10K → 15K7018+52#1158#1106
15K → 21K36*19+17#1106#1089
21K → 25K3215+17#1089#1072
25K → 30K59*27+32#1072#1040
30K → 35K4736+11#1040#1029
35K → 40K6142+19#1029#1010
40K → Finish35*6+29#1010#981
TOTALS429*204+225

* 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