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MARINE CORPS MARATHON 2025

Katie Kozlowski

Algonquin, IL

Bib: 39783 F

0:00
0:00
/ mi
Masters
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Overall
#0 / 30047
Gender (Female)
#0 / 12338
Masters (Masters Women)
#0 / 5451
Division (F40-44)
#0 / 1527
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
11:32/mi
35:50
↑ 279↓ 1640.7%
140 ft elev
10K· 6.21 mi
10:40/mi
1:08:58
↑ 103↓ 2170.7%
25 ft elev
15K· 9.32 mi
10:52/mi
1:42:45
↑ 51↓ 55
21 ft elev
21K· 13.05 mi
11:43/mi
2:26:25
↑ 20↓ 37
4 ft elev
25K· 15.53 mi
12:06/mi
2:56:30
↑ 350.2%
30 ft elev
30K· 18.64 mi
13:44/mi
3:39:10
↑ 58↓ 57
30 ft elev
35K· 21.75 mi
14:30/mi
4:24:12
↑ 98↓ 92
36 ft elev
40K· 24.85 mi
16:05/mi
5:14:10
↑ 36↓ 530.1%
18 ft elev
Finish· 26.22 mi
15:48/mi
5:35:43
↑ 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
Time2:26:25
Pace11:13 /mi
2nd Half
Distance13.17 mi
Time3:09:17
Pace14:22 /mi
📊Positive Split: 29.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi08:16:5835:5011:3235:50
11:32
-
10K
6.21 mi08:50:061:08:5811:0633:08
10:40
-0:52
15K
9.32 mi09:23:531:42:4511:0133:47
10:52
+0:12
21K
13.05 mi10:07:332:26:2511:1343:40
11:43
+0:51
25K
15.53 mi10:37:382:56:3011:2230:05
12:06
+0:23
30K
18.64 mi11:20:183:39:1011:4542:40
13:44
+1:38
35K
21.75 mi12:05:204:24:1212:0945:02
14:30
+0:46
40K
24.85 mi12:55:185:14:1012:3849:58
16:05
+1:35
Finish
26.22 mi13:16:515:35:4312:4921:33
15:48
-0:17

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

10:40 /mi

Average Pace

12:49 /mi

Slowest Pace

16:05 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:06:55

20% of race

Time at Steady Pace

1:49:35

33% of race

Time at Slower Pace

2:39:13

47% of race

Average Pace: 12:48 /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 mi08:16:5835:5011:3235:50
11:32
#21434
10K
6.21 mi08:50:061:08:5811:0633:08
10:40
#20778
15K
9.32 mi09:23:531:42:4511:0133:47
10:52
#20429
21K
13.05 mi10:07:332:26:2511:1343:40
11:43
#20616
25K
15.53 mi10:37:382:56:3011:2230:05
12:06
#20865
30K
18.64 mi11:20:183:39:1011:4542:40
13:44
#21589
35K
21.75 mi12:05:204:24:1212:0945:02
14:30
#22090
40K
24.85 mi12:55:185:14:1012:3849:58
16:05
#22917
Finish
26.22 mi13:16:515:35:4312:4921:33
15:48
#23198
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF40-44Seg. OverallSeg. FemalesSeg. F40-44
5K3.11 mi3.11 mi21434772689720033(Top 67%)7036(Top 57%)816(Top 54%)
10K6.21 mi3.10 mi20778+6567375+351863+3420145(Top 67%)7060(Top 57%)826(Top 55%)
15K9.32 mi3.11 mi20429+3497213+162846+1720033(Top 67%)7036(Top 57%)816(Top 54%)
21K13.05 mi3.73 mi20616-1877319-106855-921397(Top 71%)7782(Top 63%)895(Top 59%)
25K15.53 mi2.48 mi20865-2497513-194872-1722005(Top 73%)8332(Top 68%)967(Top 64%)
30K18.64 mi3.11 mi21589-7247944-431925-5323791(Top 79%)9417(Top 76%)1113(Top 74%)
35K21.75 mi3.11 mi22090-5018287-343970-4524326(Top 81%)9916(Top 80%)1206(Top 80%)
40K24.85 mi3.10 mi22917-8278793-5061033-6326397(Top 88%)10854(Top 88%)1302(Top 86%)
Finish26.22 mi1.37 mi23198-2818955-1621056-2325987(Top 86%)10614(Top 86%)1286(Top 85%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 67%
×18story building
+279ft-164ft

Overall

20033

Females

7036

F40-44

7036

5K→10K

3.1 - 6.2 mi

Top 67%
×11story building
+103ft-217ft

Overall

20145

Females

7060

F40-44

7060

10K→15K

6.2 - 9.3 mi

Top 67%
×3story building
+51ft-55ft

Overall

20033

Females

7036

F40-44

7036

15K→21K

9.3 - 13.1 mi

Top 71%
×1story
+20ft-37ft

Overall

21397

Females

7782

F40-44

7782

21K→25K

13.1 - 15.5 mi

Top 73%
×2story building
+35ft-8ft

Overall

22005

Females

8332

F40-44

8332

25K→30K

15.5 - 18.6 mi

Top 79%
×2story building
+58ft-57ft

Overall

23791

Females

9417

F40-44

9417

30K→35K

18.6 - 21.8 mi

Top 81%
×2story building
+98ft-92ft

Overall

24326

Females

9916

F40-44

9916

35K→40K

21.8 - 24.9 mi

Top 88%
×2story building
+36ft-53ft

Overall

26397

Females

10854

F40-44

10854

40K→Finish

24.9 - 26.2 mi

Top 86%
×5story building
+80ft-24ft

Overall

25987

Females

10614

F40-44

10614

Passing Analysis

Category:
Athletes Passed
2630*
Passed By
4394
Net Change
-1764
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#21434
5K → 10K872*216+656#21434#20778
10K → 15K581*232+349#20778#20429
15K → 21K480*667-187#20429#20616
21K → 25K268*517-249#20616#20865
25K → 30K173*897-724#20865#21589
30K → 35K159*660-501#21589#22090
35K → 40K62*889-827#22090#22917
40K → Finish35*316-281#22917#23198
TOTALS2630*4394-1764

* 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