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Official Timing Data

J & A Racing

J & A Racing

Big River Race Management

Big River Race Management
SHAMROCK MARATHON 2025

Qifa Zhou

Bib: 145 •M •Age: 37

Virginia Bch, VA

Shamrock Marathon logo
0:00
0:00
/ mi
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Overall
#0 / 1949
Gender (Male)
#0 / 1153
Age Group (M35-39)
Official
#0 / 178
Calculated (M35-39)
#0 / 178
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
30:48
3.11 mi
Rank: #1164
Start → 5K
30:48 | 9:55/mi
10K
1:01:17
6.21 mi
Rank: #1121 (+43)
5K → 10K
30:29 | 9:49/mi
15K
1:32:07
9.32 mi
Rank: #1115 (+6)
10K → 15K
30:50 | 9:56/mi
20K
2:02:52
12.43 mi
Rank: #1109 (+6)
15K → 20K
30:45 | 9:54/mi
Half
2:09:21
13.10 mi
Rank: #1088 (+21)
20K → Half
6:29 | 9:40/mi
25K
2:33:46
15.53 mi
Rank: #1060 (+28)
Half → 25K
24:25 | 10:02/mi
30K
3:03:36
18.64 mi
Rank: #1071 (-11)
25K → 30K
29:50 | 9:37/mi
35K
3:43:55
21.75 mi
Rank: #1082 (-11)
30K → 35K
40:19 | 12:59/mi
25.2M
4:22:56
25.20 mi
Rank: #1064 (+18)
35K → 25.2M
39:01 | 11:19/mi
Finish
4:31:30
26.22 mi
Rank: #1043 (+21)
25.2M → Finish
8:34 | 8:25/mi

Splits & Pacing

Detailed breakdown of your race performance at each timing point

Half Splits

1st HalfFaster
via Half
Distance13.10 mi
Time2:09:21
Pace9:53 /mi
2nd Half
Distance13.12 mi
Time2:22:09
Pace10:51 /mi
📊Positive Split: 9.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi08:13:0230:489:5530:48
9:55
-
10K
6.21 mi08:43:311:01:179:5230:29
9:49
-0:06
15K
9.32 mi09:14:211:32:079:5330:50
9:56
+0:07
20K
12.43 mi09:45:062:02:529:5430:45
9:54
-0:02
Half
13.10 mi09:51:352:09:219:536:29
9:40
-0:14
25K
15.53 mi10:16:002:33:469:5424:25
10:02
+0:22
30K
18.64 mi10:45:503:03:369:5129:50
9:37
-0:25
35K
21.75 mi11:26:093:43:5510:1840:19
12:59
+3:22
25.2M
25.20 mi12:05:104:22:5610:2739:01
11:19
-1:40
Finish
26.22 mi12:13:444:31:3010:228:34
8:25
-2:54

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

8:25 /mi

Average Pace

10:22 /mi

Slowest Pace

12:59 /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

8:34

3% of race

Time at Steady Pace

3:03:36

68% of race

Time at Slower Pace

1:19:20

29% of race

Average Pace: 10:21 /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 mi08:13:0230:489:5530:48
9:55
#1164
10K
6.21 mi08:43:311:01:179:5230:29
9:49
#1121
15K
9.32 mi09:14:211:32:079:5330:50
9:56
#1115
20K
12.43 mi09:45:062:02:529:5430:45
9:54
#1109
Half
13.10 mi09:51:352:09:219:536:29
9:40
#1088
25K
15.53 mi10:16:002:33:469:5424:25
10:02
#1060
30K
18.64 mi10:45:503:03:369:5129:50
9:37
#1071
35K
21.75 mi11:26:093:43:5510:1840:19
12:59
#1082
25.2M
25.20 mi12:05:104:22:5610:2739:01
11:19
#1064
Finish
26.22 mi12:13:444:31:3010:228:34
8:25
#1043
Faster pace
Steady pace
Slower pace

Rankings

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

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM35-39Seg. OverallSeg. MalesSeg. M35-39
5K3.11 mi3.11 mi11647861251122(Top 58%)760(Top 66%)123(Top 69%)
10K6.21 mi3.10 mi1121+43762+24122+31089(Top 56%)751(Top 65%)121(Top 68%)
15K9.32 mi3.11 mi1115+6761+1118+41122(Top 58%)760(Top 66%)123(Top 69%)
20K12.43 mi3.11 mi1109+6753+8117+11098(Top 56%)751(Top 65%)119(Top 67%)
Half13.10 mi0.67 mi1088+21742+11117753(Top 39%)546(Top 47%)83(Top 47%)
25K15.53 mi2.43 mi1060+28725+17114+3936(Top 48%)650(Top 56%)101(Top 57%)
30K18.64 mi3.11 mi1071-11725113+11129(Top 58%)733(Top 64%)115(Top 65%)
35K21.75 mi3.11 mi1082-11723+2112+11161(Top 60%)729(Top 63%)115(Top 65%)
25.2M25.20 mi3.45 mi1064+18703+20111+1989(Top 51%)603(Top 52%)91(Top 51%)
Finish26.22 mi1.02 mi1043+21690+13110+1401(Top 21%)274(Top 24%)43(Top 24%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 58%
×1
+26ft-31ft

Overall

1122

Males

760

M35-39

123

5K→10K

3.1 - 6.2 mi

Top 56%
×2
+38ft-17ft

Overall

1089

Males

751

M35-39

121

10K→15K

6.2 - 9.3 mi

Top 58%
×2
+26ft-44ft

Overall

1122

Males

760

M35-39

123

15K→20K

9.3 - 12.4 mi

Top 56%
×1
+35ft-22ft

Overall

1098

Males

751

M35-39

119

20K→Half

12.4 - 13.1 mi

Top 39%
×1
+7ft-13ft

Overall

753

Males

546

M35-39

83

Half→25K

13.1 - 15.5 mi

Top 48%
×2
+48ft-19ft

Overall

936

Males

650

M35-39

101

25K→30K

15.5 - 18.6 mi

Top 58%
×2
+38ft-52ft

Overall

1129

Males

733

M35-39

115

30K→35K

18.6 - 21.8 mi

Top 60%
×2
+39ft-39ft

Overall

1161

Males

729

M35-39

115

35K→25.2M

21.8 - 25.2 mi

Top 51%
×3
+57ft-58ft

Overall

989

Males

603

M35-39

91

25.2M→Finish

25.2 - 26.2 mi

Top 21%
×1
+17ft-12ft

Overall

401

Males

274

M35-39

43

Passing

Athletes you passed and who passed you throughout the race

Passing Analysis

Category:
Athletes Passed
247
Passed By
126
Net Change
+121
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#1164
5K → 10K5916+43#1164#1121
10K → 15K2317+6#1121#1115
15K → 20K137+6#1115#1109
20K → Half210+21#1109#1088
Half → 25K346+28#1088#1060
25K → 30K1728-11#1060#1071
30K → 35K2536-11#1071#1082
35K → 25.2M3416+18#1082#1064
25.2M → Finish210+21#1064#1043
TOTALS247126+121
📊

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

Download and share your official race completion certificate

🏆 Finisher Certificate
Download or share your official race finisher certificate
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Your certificate is generated on-demand and can be shared on social media or saved for your records

Activity Data

Upload your GPX file to see detailed activity metrics

Upload your GPX file

Supports Garmin, Apple Watch, Polar, Suunto, COROS, Strava, and other apps

.gpx files up to 10MB

Export & Support

Download your data, get help, and share your feedback

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
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