Marine Corps Marathon logo
MARINE CORPS MARATHON 2025

Emma Stiffler

Glen Rock, PA

Bib: 15210 F

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 30047
Gender (Female)
#0 / 12338
Top 44%
Division (F25-29)
#0 / 2322
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
10:18/mi
32:01
↑ 279↓ 1640.7%
140 ft elev
10K· 6.21 mi
10:02/mi
1:03:11
↑ 103↓ 2170.7%
25 ft elev
15K· 9.32 mi
10:12/mi
1:34:51
↑ 51↓ 55
21 ft elev
21K· 13.05 mi
10:10/mi
2:12:45
↑ 20↓ 37
4 ft elev
25K· 15.53 mi
10:18/mi
2:38:21
↑ 350.2%
30 ft elev
30K· 18.64 mi
11:18/mi
3:13:28
↑ 58↓ 57
30 ft elev
35K· 21.75 mi
12:16/mi
3:51:35
↑ 98↓ 92
36 ft elev
40K· 24.85 mi
12:50/mi
4:31:27
↑ 36↓ 530.1%
18 ft elev
Finish· 26.22 mi
11:42/mi
4:47:25
↑ 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 21KFaster
Distance13.05 mi
Time2:12:45
Pace10:10 /mi
2nd Half
Distance13.17 mi
Time2:34:39
Pace11:45 /mi
📊Positive Split: 16.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi08:12:0832:0110:1832:01
10:18
-
10K
6.21 mi08:43:181:03:1110:1031:10
10:02
-0:16
15K
9.32 mi09:14:581:34:5110:1131:40
10:12
+0:10
21K
13.05 mi09:52:522:12:4510:1037:54
10:10
-0:02
25K
15.53 mi10:18:282:38:2110:1225:36
10:18
+0:08
30K
18.64 mi10:53:353:13:2810:2335:07
11:18
+1:00
35K
21.75 mi11:31:423:51:3510:3938:07
12:16
+0:58
40K
24.85 mi12:11:344:31:2710:5539:52
12:50
+0:34
Finish
26.22 mi12:27:324:47:2510:5815:58
11:42
-1:08

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

10:02 /mi

Average Pace

10:58 /mi

Slowest Pace

12:50 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

0:00

0% of race

Time at Steady Pace

2:38:21

55% of race

Time at Slower Pace

2:09:04

45% of race

Average Pace: 10:58 /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 mi08:12:0832:0110:1832:01
10:18
#13574
10K
6.21 mi08:43:181:03:1110:1031:10
10:02
#14670
15K
9.32 mi09:14:581:34:5110:1131:40
10:12
#15026
21K
13.05 mi09:52:522:12:4510:1037:54
10:10
#14613
25K
15.53 mi10:18:282:38:2110:1225:36
10:18
#14546
30K
18.64 mi10:53:353:13:2810:2335:07
11:18
#14729
35K
21.75 mi11:31:423:51:3510:3938:07
12:16
#15260
40K
24.85 mi12:11:344:31:2710:5539:52
12:50
#15694
Finish
26.22 mi12:27:324:47:2510:5815:58
11:42
#15602
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF25-29Seg. OverallSeg. FemalesSeg. F25-29
5K3.11 mi3.11 mi135744132101415890(Top 53%)5141(Top 42%)1233(Top 53%)
10K6.21 mi3.10 mi14670-10964573-4411106-9215894(Top 53%)5098(Top 41%)1206(Top 52%)
15K9.32 mi3.11 mi15026-3564731-1581153-4715890(Top 53%)5141(Top 42%)1233(Top 53%)
21K13.05 mi3.73 mi14613+4134580+1511124+2914082(Top 47%)4390(Top 36%)1099(Top 47%)
25K15.53 mi2.48 mi14546+674614-341133-915030(Top 50%)5017(Top 41%)1243(Top 54%)
30K18.64 mi3.11 mi14729-1834769-1551180-4715980(Top 53%)5692(Top 46%)1356(Top 58%)
35K21.75 mi3.11 mi15260-5315118-3491244-6417589(Top 59%)6810(Top 55%)1565(Top 68%)
40K24.85 mi3.10 mi15694-4345458-3401306-6217855(Top 59%)7099(Top 58%)1600(Top 69%)
Finish26.22 mi1.37 mi15602+925460-21313-714739(Top 49%)5743(Top 47%)1409(Top 61%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 53%
×18story building
+279ft-164ft

Overall

15890

Females

5141

F25-29

5141

5K→10K

3.1 - 6.2 mi

Top 53%
×11story building
+103ft-217ft

Overall

15894

Females

5098

F25-29

5098

10K→15K

6.2 - 9.3 mi

Top 53%
×3story building
+51ft-55ft

Overall

15890

Females

5141

F25-29

5141

15K→21K

9.3 - 13.1 mi

Top 47%
×1story
+20ft-37ft

Overall

14082

Females

4390

F25-29

4390

21K→25K

13.1 - 15.5 mi

Top 50%
×2story building
+35ft-8ft

Overall

15030

Females

5017

F25-29

5017

25K→30K

15.5 - 18.6 mi

Top 53%
×2story building
+58ft-57ft

Overall

15980

Females

5692

F25-29

5692

30K→35K

18.6 - 21.8 mi

Top 59%
×2story building
+98ft-92ft

Overall

17589

Females

6810

F25-29

6810

35K→40K

21.8 - 24.9 mi

Top 59%
×2story building
+36ft-53ft

Overall

17855

Females

7099

F25-29

7099

40K→Finish

24.9 - 26.2 mi

Top 49%
×5story building
+80ft-24ft

Overall

14739

Females

5743

F25-29

5743

Passing Analysis

Category:
Athletes Passed
2087*
Passed By
4115
Net Change
-2028
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#13574
5K → 10K94*1190-1096#13574#14670
10K → 15K194*550-356#14670#15026
15K → 21K560*147+413#15026#14613
21K → 25K311*244+67#14613#14546
25K → 30K294*477-183#14546#14729
30K → 35K251*782-531#14729#15260
35K → 40K207*641-434#15260#15694
40K → Finish176*84+92#15694#15602
TOTALS2087*4115-2028

* 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