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Official Timing Data

J & A Racing

J & A Racing

Big River Race Management

Big River Race Management
SHAMROCK MARATHON 2025

Chris Polakowski

Bib: 397 •M •Age: 32

Riverdale, NJ

Shamrock Marathon logo
0:00
0:00
/ mi
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Overall
#0 / 1949
Top 19%
Gender (Male)
#0 / 1153
Top 24%
Age Group (M30-34)
#0 / 185
Top 25%
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
26:43
3.11 mi
Rank: #567
Start → 5K
26:43 | 8:36/mi
10K
51:52
6.21 mi
Rank: #459 (+108)
5K → 10K
25:09 | 8:06/mi
15K
1:16:41
9.32 mi
Rank: #420 (+39)
10K → 15K
24:49 | 8:00/mi
20K
1:41:19
12.43 mi
Rank: #396 (+24)
15K → 20K
24:38 | 7:56/mi
Half
1:47:03
13.10 mi
Rank: #388 (+8)
20K → Half
5:44 | 8:33/mi
25K
2:06:51
15.53 mi
Rank: #366 (+22)
Half → 25K
19:48 | 8:08/mi
30K
2:29:16
18.64 mi
Rank: #354 (+12)
25K → 30K
22:25 | 7:13/mi
35K
2:59:08
21.75 mi
Rank: #347 (+7)
30K → 35K
29:52 | 9:37/mi
25.2M
3:32:30
25.20 mi
Rank: #364 (-17)
35K → 25.2M
33:22 | 9:41/mi
Finish
3:41:11
26.22 mi
Rank: #367 (-3)
25.2M → Finish
8:41 | 8:32/mi

Splits & Pacing

Detailed breakdown of your race performance at each timing point

Half Splits

1st HalfFaster
via Half
Distance13.10 mi
Time1:47:03
Pace8:11 /mi
2nd Half
Distance13.12 mi
Time1:54:09
Pace8:43 /mi
📊Positive Split: 6.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi07:58:5226:438:3626:43
8:36
-
10K
6.21 mi08:24:0151:528:2125:09
8:06
-0:30
15K
9.32 mi08:48:501:16:418:1424:49
8:00
-0:06
20K
12.43 mi09:13:281:41:198:1024:38
7:56
-0:04
Half
13.10 mi09:19:121:47:038:115:44
8:33
+0:37
25K
15.53 mi09:39:002:06:518:1019:48
8:08
-0:25
30K
18.64 mi10:01:252:29:168:0122:25
7:13
-0:55
35K
21.75 mi10:31:172:59:088:1529:52
9:37
+2:24
25.2M
25.20 mi11:04:393:32:308:2633:22
9:41
+0:04
Finish
26.22 mi11:13:203:41:118:278:41
8:32
-1:09

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

7:13 /mi

Average Pace

8:27 /mi

Slowest Pace

9:41 /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

1:56:49

53% of race

Time at Steady Pace

41:08

19% of race

Time at Slower Pace

1:03:14

29% of race

Average Pace: 8:26 /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 mi07:58:5226:438:3626:43
8:36
#567
10K
6.21 mi08:24:0151:528:2125:09
8:06
#459
15K
9.32 mi08:48:501:16:418:1424:49
8:00
#420
20K
12.43 mi09:13:281:41:198:1024:38
7:56
#396
Half
13.10 mi09:19:121:47:038:115:44
8:33
#388
25K
15.53 mi09:39:002:06:518:1019:48
8:08
#366
30K
18.64 mi10:01:252:29:168:0122:25
7:13
#354
35K
21.75 mi10:31:172:59:088:1529:52
9:37
#347
25.2M
25.20 mi11:04:393:32:308:2633:22
9:41
#364
Finish
26.22 mi11:13:203:41:118:278:41
8:32
#367
Faster pace
Steady pace
Slower pace

Rankings

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

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM30-34Seg. OverallSeg. MalesSeg. M30-34
5K3.11 mi3.11 mi56742467333(Top 17%)259(Top 22%)44(Top 24%)
10K6.21 mi3.10 mi459+108349+7560+7385(Top 20%)297(Top 26%)52(Top 28%)
15K9.32 mi3.11 mi420+39323+2655+5333(Top 17%)259(Top 22%)44(Top 24%)
20K12.43 mi3.11 mi396+24305+1854+1320(Top 16%)248(Top 22%)46(Top 25%)
Half13.10 mi0.67 mi388+8301+453+1343(Top 18%)266(Top 23%)45(Top 24%)
25K15.53 mi2.43 mi366+22282+1950+3304(Top 16%)235(Top 20%)42(Top 23%)
30K18.64 mi3.11 mi354+12273+949+1305(Top 16%)234(Top 20%)43(Top 23%)
35K21.75 mi3.11 mi347+7267+647+2339(Top 17%)244(Top 21%)40(Top 22%)
25.2M25.20 mi3.45 mi364-17274-747532(Top 27%)353(Top 31%)52(Top 28%)
Finish26.22 mi1.02 mi367-3272+246+1442(Top 23%)301(Top 26%)45(Top 24%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 17%
×1
+26ft-31ft

Overall

333

Males

259

M30-34

44

5K→10K

3.1 - 6.2 mi

Top 20%
×2
+38ft-17ft

Overall

385

Males

297

M30-34

52

10K→15K

6.2 - 9.3 mi

Top 17%
×2
+26ft-44ft

Overall

333

Males

259

M30-34

44

15K→20K

9.3 - 12.4 mi

Top 16%
×1
+35ft-22ft

Overall

320

Males

248

M30-34

46

20K→Half

12.4 - 13.1 mi

Top 18%
×1
+7ft-13ft

Overall

343

Males

266

M30-34

45

Half→25K

13.1 - 15.5 mi

Top 16%
×2
+48ft-19ft

Overall

304

Males

235

M30-34

42

25K→30K

15.5 - 18.6 mi

Top 16%
×2
+38ft-52ft

Overall

305

Males

234

M30-34

43

30K→35K

18.6 - 21.8 mi

Top 17%
×2
+39ft-39ft

Overall

339

Males

244

M30-34

40

35K→25.2M

21.8 - 25.2 mi

Top 27%
×3
+57ft-58ft

Overall

532

Males

353

M30-34

52

25.2M→Finish

25.2 - 26.2 mi

Top 23%
×1
+17ft-12ft

Overall

442

Males

301

M30-34

45

Passing

Athletes you passed and who passed you throughout the race

Passing Analysis

Category:
Athletes Passed
241
Passed By
41
Net Change
+200
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#567
5K → 10K1080+108#567#459
10K → 15K401+39#459#420
15K → 20K240+24#420#396
20K → Half80+8#396#388
Half → 25K242+22#388#366
25K → 30K120+12#366#354
30K → 35K169+7#354#347
35K → 25.2M522-17#347#364
25.2M → Finish47-3#364#367
TOTALS24141+200
📊

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.

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