Marine Corps Marathon logo
MARINE CORPS MARATHON 2025

Samantha Kempner

Ann Arbor, MI

Bib: 4946 F

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 30047
Top 7%
Gender (Female)
#0 / 12338
Top 3%
Masters (Masters Women)
#0 / 5451
Top 1%
Division (F45-49)
#0 / 1255
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
8:28/mi
26:19
↑ 279↓ 1640.7%
140 ft elev
10K· 6.21 mi
7:38/mi
50:03
↑ 103↓ 2170.7%
25 ft elev
15K· 9.32 mi
7:41/mi
1:13:56
↑ 51↓ 55
21 ft elev
21K· 13.05 mi
7:34/mi
1:42:09
↑ 20↓ 37
4 ft elev
25K· 15.53 mi
7:23/mi
2:00:30
↑ 350.2%
30 ft elev
30K· 18.64 mi
7:44/mi
2:24:32
↑ 58↓ 57
30 ft elev
35K· 21.75 mi
8:06/mi
2:49:41
↑ 98↓ 92
36 ft elev
40K· 24.85 mi
8:37/mi
3:16:26
↑ 36↓ 530.1%
18 ft elev
Finish· 26.22 mi
8:43/mi
3:28:20
↑ 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
Time1:42:09
Pace7:50 /mi
2nd Half
Distance13.17 mi
Time1:46:11
Pace8:04 /mi
📊Positive Split: 3.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi07:51:1126:198:2826:19
8:28
-
10K
6.21 mi08:14:5550:038:0323:44
7:38
-0:50
15K
9.32 mi08:38:481:13:567:5623:53
7:41
+0:03
21K
13.05 mi09:07:011:42:097:5028:13
7:34
-0:07
25K
15.53 mi09:25:222:00:307:4518:21
7:23
-0:11
30K
18.64 mi09:49:242:24:327:4524:02
7:44
+0:21
35K
21.75 mi10:14:332:49:417:4825:09
8:06
+0:22
40K
24.85 mi10:41:183:16:267:5426:45
8:37
+0:31
Finish
26.22 mi10:53:123:28:207:5711:54
8:43
+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

7:23 /mi

Average Pace

7:57 /mi

Slowest Pace

8:43 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:23:22

69% of race

Time at Steady Pace

53:04

25% of race

Time at Slower Pace

11:54

6% of race

Average Pace: 7:57 /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 mi07:51:1126:198:2826:19
8:28
#3126
10K
6.21 mi08:14:5550:038:0323:44
7:38
#2709
15K
9.32 mi08:38:481:13:567:5623:53
7:41
#2595
21K
13.05 mi09:07:011:42:097:5028:13
7:34
#2254
25K
15.53 mi09:25:222:00:307:4518:21
7:23
#2134
30K
18.64 mi09:49:242:24:327:4524:02
7:44
#1991
35K
21.75 mi10:14:332:49:417:4825:09
8:06
#1955
40K
24.85 mi10:41:183:16:267:5426:45
8:37
#1992
Finish
26.22 mi10:53:123:28:207:5711:54
8:43
#2026
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi3126584352481(Top 8%)440(Top 4%)22(Top 2%)
10K6.21 mi3.10 mi2709+417485+9926+92410(Top 8%)427(Top 3%)22(Top 2%)
15K9.32 mi3.11 mi2595+114469+1625+12481(Top 8%)440(Top 4%)22(Top 2%)
21K13.05 mi3.73 mi2254+341403+6622+31633(Top 5%)241(Top 2%)8(Top 0.6%)
25K15.53 mi2.48 mi2134+120376+2721+11620(Top 5%)250(Top 2%)10(Top 0.8%)
30K18.64 mi3.11 mi1991+143346+3019+21690(Top 6%)287(Top 2%)12(Top 1.0%)
35K21.75 mi3.11 mi1955+3634618+12114(Top 7%)429(Top 3%)22(Top 2%)
40K24.85 mi3.10 mi1992-37372-2621-32953(Top 10%)737(Top 6%)46(Top 4%)
Finish26.22 mi1.37 mi2026-34387-1520+13341(Top 11%)896(Top 7%)46(Top 4%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 8%
×18story building
+279ft-164ft

Overall

2481

Females

440

F45-49

440

5K→10K

3.1 - 6.2 mi

Top 8%
×11story building
+103ft-217ft

Overall

2410

Females

427

F45-49

427

10K→15K

6.2 - 9.3 mi

Top 8%
×3story building
+51ft-55ft

Overall

2481

Females

440

F45-49

440

15K→21K

9.3 - 13.1 mi

Top 5%
×1story
+20ft-37ft

Overall

1633

Females

241

F45-49

241

21K→25K

13.1 - 15.5 mi

Top 5%
×2story building
+35ft-8ft

Overall

1620

Females

250

F45-49

250

25K→30K

15.5 - 18.6 mi

Top 6%
×2story building
+58ft-57ft

Overall

1690

Females

287

F45-49

287

30K→35K

18.6 - 21.8 mi

Top 7%
×2story building
+98ft-92ft

Overall

2114

Females

429

F45-49

429

35K→40K

21.8 - 24.9 mi

Top 10%
×2story building
+36ft-53ft

Overall

2953

Females

737

F45-49

737

40K→Finish

24.9 - 26.2 mi

Top 11%
×5story building
+80ft-24ft

Overall

3341

Females

896

F45-49

896

Passing Analysis

Category:
Athletes Passed
1444*
Passed By
344
Net Change
+1100
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#3126
5K → 10K453*36+417#3126#2709
10K → 15K149*35+114#2709#2595
15K → 21K341*0+341#2595#2254
21K → 25K13111+120#2254#2134
25K → 30K158*15+143#2134#1991
30K → 35K9761+36#1991#1955
35K → 40K82*119-37#1955#1992
40K → Finish33*67-34#1992#2026
TOTALS1444*344+1100

* 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