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SHAMROCK MARATHON 2025

Erin Leifer

Bib: 1093•F•Age: 31

Fairfax, VA

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0:00
0:00
/ mi
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Overall
#0 / 1949
Top 31%
Gender (Female)
#0 / 791
Top 23%
Age Group (F30-34)
#0 / 104
Top 29%
Race Day Weather
71°/61°F
overcast clouds

Race Timeline and Course Information

Your journey through the course with elevation, pacing, and checkpoint details

⏱️ Race Timeline

Watch your race unfold from start to finish

Start
0:00:00
Race begins
5K
26:11
3.11 mi
Rank: #494
Start → 5K
26:11 | 8:26/mi
10K
52:43
6.21 mi
Rank: #509 (-15)
5K → 10K
26:32 | 8:33/mi
15K
1:20:24
9.32 mi
Rank: #573 (-64)
10K → 15K
27:41 | 8:55/mi
20K
1:48:28
12.43 mi
Rank: #641 (-68)
15K → 20K
28:04 | 9:03/mi
Half
1:54:56
13.10 mi
Rank: #639 (+2)
20K → Half
6:28 | 9:39/mi
25K
2:18:12
15.53 mi
Rank: #666 (-27)
Half → 25K
23:16 | 9:34/mi
30K
2:43:52
18.64 mi
Rank: #649 (+17)
25K → 30K
25:40 | 8:16/mi
35K
3:16:46
21.75 mi
Rank: #619 (+30)
30K → 35K
32:54 | 10:36/mi
25.2M
3:50:00
25.20 mi
Rank: #613 (+6)
35K → 25.2M
33:14 | 9:38/mi
Finish
3:58:40
26.22 mi
Rank: #600 (+13)
25.2M → Finish
8:40 | 8:31/mi

Splits & Pacing

Detailed breakdown of your race performance at each timing point

Half Splits

1st HalfFaster
via Half
Distance13.10 mi
Time1:54:56
Pace8:47 /mi
2nd Half
Distance13.12 mi
Time2:03:45
Pace9:26 /mi
📊Positive Split: 7.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi07:58:2226:118:2626:11
8:26
-
10K
6.21 mi08:24:5452:438:3026:32
8:33
+0:07
15K
9.32 mi08:52:351:20:248:3827:41
8:55
+0:22
20K
12.43 mi09:20:391:48:288:4428:04
9:03
+0:08
Half
13.10 mi09:27:071:54:568:476:28
9:39
+0:36
25K
15.53 mi09:50:232:18:128:5423:16
9:34
-0:05
30K
18.64 mi10:16:032:43:528:4825:40
8:16
-1:18
35K
21.75 mi10:48:573:16:469:0332:54
10:36
+2:20
25.2M
25.20 mi11:22:113:50:009:0833:14
9:38
-0:58
Finish
26.22 mi11:30:513:58:409:078:40
8:31
-1:07

Checkpoint Splits Visualizations

Explore your race data through different visual perspectives. Scroll to discover each visualization.

📈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

8:16 /mi

Average Pace

9:07 /mi

Slowest Pace

10:36 /mi

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Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Bar length shows time spent in each segment. Colors mark your faster to slower segments, relative to your own pace.

Time at Faster Pace

1:27:03

36% of race

Time at Steady Pace

55:45

23% of race

Time at Slower Pace

1:35:52

40% of race

Average Pace: 9:06 /mi

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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

Enhanced split table showing pace trends through mini sparkline visualizations.

Overall Pace Trend

CheckpointDistanceTime of DayTimeAvg PaceSegmentPaceTrendRank
5K
3.11 mi07:58:2226:118:2626:11
8:26
#494
10K
6.21 mi08:24:5452:438:3026:32
8:33
#509
15K
9.32 mi08:52:351:20:248:3827:41
8:55
#573
20K
12.43 mi09:20:391:48:288:4428:04
9:03
#641
Half
13.10 mi09:27:071:54:568:476:28
9:39
#639
25K
15.53 mi09:50:232:18:128:5423:16
9:34
#666
30K
18.64 mi10:16:032:43:528:4825:40
8:16
#649
35K
21.75 mi10:48:573:16:469:0332:54
10:36
#619
25.2M
25.20 mi11:22:113:50:009:0833:14
9:38
#613
Finish
26.22 mi11:30:513:58:409:078:40
8:31
#600
Faster pace
Steady pace
Slower pace

Rankings

Your position at each checkpoint and how you ranked in each segment

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF30-34Seg. OverallSeg. FemalesSeg. F30-34
5K3.11 mi3.11 mi49412422714(Top 37%)196(Top 25%)32(Top 31%)
10K6.21 mi3.10 mi509-15128-422536(Top 28%)135(Top 17%)24(Top 23%)
15K9.32 mi3.11 mi573-64147-1925-3714(Top 37%)196(Top 25%)32(Top 31%)
20K12.43 mi3.11 mi641-68172-2531-6790(Top 41%)222(Top 28%)37(Top 36%)
Half13.10 mi0.67 mi639+217231745(Top 38%)206(Top 26%)35(Top 34%)
25K15.53 mi2.43 mi666-27176-429+2789(Top 40%)227(Top 29%)35(Top 34%)
30K18.64 mi3.11 mi649+17174+229685(Top 35%)198(Top 25%)32(Top 31%)
35K21.75 mi3.11 mi619+3017429575(Top 30%)175(Top 22%)30(Top 29%)
25.2M25.20 mi3.45 mi613+6182-830-1523(Top 27%)175(Top 22%)31(Top 30%)
Finish26.22 mi1.02 mi600+13179+330434(Top 22%)139(Top 18%)28(Top 27%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 37%
×1
+26ft-31ft

Overall

714

Females

196

F30-34

32

5K→10K

3.1 - 6.2 mi

Top 28%
×2
+38ft-17ft

Overall

536

Females

135

F30-34

24

10K→15K

6.2 - 9.3 mi

Top 37%
×2
+26ft-44ft

Overall

714

Females

196

F30-34

32

15K→20K

9.3 - 12.4 mi

Top 41%
×1
+35ft-22ft

Overall

790

Females

222

F30-34

37

20K→Half

12.4 - 13.1 mi

Top 38%
×1
+7ft-13ft

Overall

745

Females

206

F30-34

35

Half→25K

13.1 - 15.5 mi

Top 40%
×2
+48ft-19ft

Overall

789

Females

227

F30-34

35

25K→30K

15.5 - 18.6 mi

Top 35%
×2
+38ft-52ft

Overall

685

Females

198

F30-34

32

30K→35K

18.6 - 21.8 mi

Top 30%
×2
+39ft-39ft

Overall

575

Females

175

F30-34

30

35K→25.2M

21.8 - 25.2 mi

Top 27%
×3
+57ft-58ft

Overall

523

Females

175

F30-34

31

25.2M→Finish

25.2 - 26.2 mi

Top 22%
×1
+17ft-12ft

Overall

434

Females

139

F30-34

28

Passing

Athletes you passed and who passed you throughout the race

Passing Analysis

Category:
Athletes Passed
141
Passed By
247
Net Change
-106
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#494
5K → 10K722-15#494#509
10K → 15K165-64#509#573
15K → 20K371-68#573#641
20K → Half97+2#641#639
Half → 25K532-27#639#666
25K → 30K3215+17#666#649
30K → 35K4515+30#649#619
35K → 25.2M2620+6#619#613
25.2M → Finish130+13#613#600
TOTALS141247-106
📊

Passing Analysis Visualizations

Explore your passing analysis through 5 different visualizations. Scroll to discover each one.

Time:
Category:

📈Position Graph

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🎨Heatmap Timeline

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🔄Passing Circle

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🌊Position Flow

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🏃Race Lanes

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Qualifying & Age Grade

See how your performance stacks up against qualifying standards

BQ

Boston Qualifying analysis available

Finisher Certificate

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🏆 Finisher Certificate
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Activity Data

Upload your GPX file to see detailed activity metrics

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.gpx files up to 10MB

Export & Support

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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.

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Official Timing Data

J & A Racing

J & A Racing

Big River Race Management

Big River Race Management