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SHAMROCK MARATHON 2025

ByoungGu Ko

Alexandria, VA

Bib: 646 M 53

0:00
0:00
/ mi
MastersBQ
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Overall
#0 / 1949
Top 5%
Gender (Male)
#0 / 1153
Top 7%
Masters (Masters Men)
#0 / 398
Top 4%
Division (M50-54)
#0 / 76
Top 1%
Race Day Weather
71°/61°F
overcast clouds

⏱️ Race Timeline

Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
7 ft elev
5K· 3.11 mi
6:48/mi
21:06
↑ 26↓ 31
1 ft elev
10K· 6.21 mi
6:48/mi
42:12
↑ 38↓ 170.1%
22 ft elev
15K· 9.32 mi
6:52/mi
1:03:29
↑ 26↓ 440.1%
5 ft elev
20K· 12.43 mi
6:56/mi
1:25:00
↑ 35↓ 22
17 ft elev
Half· 13.10 mi
7:23/mi
1:29:57
↓ 130.2%
11 ft elev
25K· 15.53 mi
7:52/mi
1:49:05
↑ 48↓ 190.2%
38 ft elev
30K· 18.64 mi
6:16/mi
2:08:33
↑ 38↓ 52
25 ft elev
35K· 21.75 mi
8:21/mi
2:34:29
↑ 39↓ 39
25 ft elev
25.2M
7:49/mi
3:01:25
↑ 57↓ 58
24 ft elev
Finish· 26.22 mi
7:29/mi
3:09:02
↑ 17↓ 12
28 ft elev
Course Elevation
-8–55 ft
≈
×5story building
•▲ 331 ft climb · ▼ 310 ft descent

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.10 mi
Time1:29:57
Pace6:53 /mi
2nd Half
Distance13.12 mi
Time1:39:06
Pace7:34 /mi
📊Positive Split: 10.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi07:51:1721:066:4821:06
6:48
-
10K
6.21 mi08:12:2342:126:4821:06
6:48
0:00
15K
9.32 mi08:33:401:03:296:4921:17
6:52
+0:04
20K
12.43 mi08:55:111:25:006:5121:31
6:56
+0:04
Half
13.10 mi09:00:081:29:576:534:57
7:23
+0:27
25K
15.53 mi09:19:161:49:057:0219:08
7:52
+0:29
30K
18.64 mi09:38:442:08:336:5419:28
6:16
-1:36
35K
21.75 mi10:04:402:34:297:0725:56
8:21
+2:05
25.2M
25.20 mi10:31:363:01:257:1226:56
7:49
-0:32
Finish
26.22 mi10:39:133:09:027:137:37
7:29
-0:20

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

6:16 /mi

Average Pace

7:13 /mi

Slowest Pace

8:21 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:44:28

55% of race

Time at Steady Pace

12:34

7% of race

Time at Slower Pace

1:12:00

38% of race

Average Pace: 7:13 /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 mi07:51:1721:066:4821:06
6:48
#63
10K
6.21 mi08:12:2342:126:4821:06
6:48
#51
15K
9.32 mi08:33:401:03:296:4921:17
6:52
#50
20K
12.43 mi08:55:111:25:006:5121:31
6:56
#65
Half
13.10 mi09:00:081:29:576:534:57
7:23
#67
25K
15.53 mi09:19:161:49:057:0219:08
7:52
#92
30K
18.64 mi09:38:442:08:336:5419:28
6:16
#85
35K
21.75 mi10:04:402:34:297:0725:56
8:21
#86
25.2M
25.20 mi10:31:363:01:257:1226:56
7:49
#87
Finish
26.22 mi10:39:133:09:027:137:37
7:29
#91
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi3.11 mi6355180(Top 4%)73(Top 6%)1(Top 1%)
10K6.21 mi3.10 mi51+1246+9148(Top 2%)43(Top 4%)1(Top 1%)
15K9.32 mi3.11 mi50+145+1180(Top 4%)73(Top 6%)1(Top 1%)
20K12.43 mi3.11 mi65-1559-14193(Top 5%)83(Top 7%)1(Top 1%)
Half13.10 mi0.67 mi67-261-2171(Top 4%)65(Top 6%)1(Top 1%)
25K15.53 mi2.43 mi92-2582-211224(Top 11%)176(Top 15%)9(Top 12%)
30K18.64 mi3.11 mi85+776+6176(Top 4%)71(Top 6%)1(Top 1%)
35K21.75 mi3.11 mi86-177-11116(Top 6%)97(Top 8%)1(Top 1%)
25.2M25.20 mi3.45 mi87-179-21120(Top 6%)96(Top 8%)1(Top 1%)
Finish26.22 mi1.02 mi91-482-31167(Top 9%)127(Top 11%)3(Top 4%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 4%
×1story
+26ft-31ft

Overall

80

Males

73

M50-54

1

5K→10K

3.1 - 6.2 mi

Top 2%
×2story building
+38ft-17ft

Overall

48

Males

43

M50-54

1

10K→15K

6.2 - 9.3 mi

Top 4%
×2story building
+26ft-44ft

Overall

80

Males

73

M50-54

1

15K→20K

9.3 - 12.4 mi

Top 5%
×1story
+35ft-22ft

Overall

93

Males

83

M50-54

1

20K→Half

12.4 - 13.1 mi

Top 4%
×1human
+7ft-13ft

Overall

71

Males

65

M50-54

1

Half→25K

13.1 - 15.5 mi

Top 11%
×2story building
+48ft-19ft

Overall

224

Males

176

M50-54

9

25K→30K

15.5 - 18.6 mi

Top 4%
×2story building
+38ft-52ft

Overall

76

Males

71

M50-54

1

30K→35K

18.6 - 21.8 mi

Top 6%
×2stacked humans
+39ft-39ft

Overall

116

Males

97

M50-54

1

35K→25.2M

21.8 - 25.2 mi

Top 6%
×3story building
+57ft-58ft

Overall

120

Males

96

M50-54

1

25.2M→Finish

25.2 - 26.2 mi

Top 9%
×1human
+17ft-12ft

Overall

167

Males

127

M50-54

3

Passing Analysis

Category:
Athletes Passed
37
Passed By
65
Net Change
-28
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#63
5K → 10K142+12#63#51
10K → 15K21+1#51#50
15K → 20K015-15#50#65
20K → Half13-2#65#67
Half → 25K126-25#67#92
25K → 30K70+7#92#85
30K → 35K34-1#85#86
35K → 25.2M89-1#86#87
25.2M → Finish15-4#87#91
TOTALS3765-28
📊

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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Official Timing Data

J & A Racing

J & A Racing

Big River Race Management

Big River Race Management