Shamrock Marathon logo
SHAMROCK MARATHON 2026

Colleen Leddie

Bib: 1639•F•Age: 32

Boston, MA

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 2429
Top 23%
Gender (Female)
#0 / 943
Top 12%
Division (F30-34)
#0 / 164
Top 20%
Race Day Weather
55°/45°F
few clouds

⏱️ Race Timeline

Course Elevation
-8–55 ft
≈
×5story building
•▲ 331 ft climb · ▼ 310 ft descent
Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
5K· 3.11 mi
8:32/mi
26:30
↑ 26↓ 31
10K· 6.21 mi
8:11/mi
51:54
↑ 38↓ 170.1%
15K· 9.32 mi
8:09/mi
1:17:13
↑ 26↓ 440.1%
20K· 12.43 mi
8:36/mi
1:43:56
↑ 35↓ 22
Half· 13.10 mi
8:43/mi
1:49:47
↓ 130.2%
30K· 18.64 mi
8:32/mi
2:37:05
↑ 86↓ 72
35K· 21.75 mi
10:02/mi
3:08:14
↑ 39↓ 39
25.2M
10:03/mi
3:42:57
↑ 57↓ 58
Finish· 26.22 mi
9:37/mi
3:52:45
↑ 17↓ 12

The Course

Is this your race?

Claim it — unlock a deeper AI report on this race, free

A personalized Race Performance Report that goes beyond this page — emailed to you, built from your real splits.

Half Splits

1st Half· via HalfFaster
Distance13.10 mi
Time1:49:47
Pace8:23 /mi
2nd Half
Distance13.12 mi
Time2:02:58
Pace9:22 /mi
📊Positive Split: 12.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi08:03:0126:308:3226:30
8:32
-
10K
6.21 mi08:28:2551:548:2125:24
8:11
-0:21
15K
9.32 mi08:53:441:17:138:1725:19
8:09
-0:02
20K
12.43 mi09:20:271:43:568:2226:43
8:36
+0:27
Half
13.10 mi09:26:181:49:478:235:51
8:43
+0:07
30K
18.64 mi10:13:362:37:058:2647:18
8:32
-0:11
35K
21.75 mi10:44:453:08:148:3931:09
10:02
+1:30
25.2M
25.20 mi11:19:283:42:578:5134:43
10:03
+0:01
Finish
26.22 mi11:29:163:52:458:539:48
9:37
-0:26

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

8:09 /mi

Average Pace

8:53 /mi

Slowest Pace

10:03 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

50:43

22% of race

Time at Steady Pace

1:46:22

46% of race

Time at Slower Pace

1:15:40

33% of race

Average Pace: 8:53 /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 mi08:03:0126:308:3226:30
8:32
#715
10K
6.21 mi08:28:2551:548:2125:24
8:11
#637
15K
9.32 mi08:53:441:17:138:1725:19
8:09
#615
20K
12.43 mi09:20:271:43:568:2226:43
8:36
#620
Half
13.10 mi09:26:181:49:478:235:51
8:43
#613
30K
18.64 mi10:13:362:37:058:2647:18
8:32
#565
35K
21.75 mi10:44:453:08:148:3931:09
10:02
#547
25.2M
25.20 mi11:19:283:42:578:5134:43
10:03
#554
Finish
26.22 mi11:29:163:52:458:539:48
9:37
#556
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF30-34Seg. OverallSeg. FemalesSeg. F30-34
5K3.11 mi3.11 mi71514431579(Top 24%)101(Top 11%)24(Top 15%)
10K6.21 mi3.10 mi637+78119+2527+4593(Top 24%)106(Top 11%)26(Top 16%)
15K9.32 mi3.11 mi615+22113+626+1579(Top 24%)101(Top 11%)24(Top 15%)
20K12.43 mi3.11 mi620-5115-229-3691(Top 28%)139(Top 15%)34(Top 21%)
Half13.10 mi0.67 mi613+7112+330-1718(Top 30%)147(Top 16%)37(Top 23%)
30K18.64 mi5.54 mi565+48109+328+2584(Top 24%)115(Top 12%)32(Top 20%)
35K21.75 mi3.11 mi547+18105+428591(Top 24%)141(Top 15%)36(Top 22%)
25.2M25.20 mi3.45 mi554-7115-1032-4640(Top 26%)191(Top 20%)45(Top 28%)
Finish26.22 mi1.02 mi556-2117-233-1807(Top 33%)257(Top 27%)57(Top 35%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 24%
×1story
+26ft-31ft

Overall

579

Females

101

F30-34

26

5K→10K

3.1 - 6.2 mi

Top 24%
×2story building
+38ft-17ft

Overall

593

Females

106

F30-34

28

10K→15K

6.2 - 9.3 mi

Top 24%
×2story building
+26ft-44ft

Overall

579

Females

101

F30-34

26

15K→20K

9.3 - 12.4 mi

Top 28%
×1story
+35ft-22ft

Overall

691

Females

139

F30-34

36

20K→Half

12.4 - 13.1 mi

Top 30%
×1human
+7ft-13ft

Overall

718

Females

147

F30-34

39

Half→30K

13.1 - 18.6 mi

Top 24%
×2story building
+86ft-72ft

Overall

584

Females

115

F30-34

34

30K→35K

18.6 - 21.8 mi

Top 24%
×2stacked humans
+39ft-39ft

Overall

591

Females

141

F30-34

38

35K→25.2M

21.8 - 25.2 mi

Top 26%
×3story building
+57ft-58ft

Overall

640

Females

191

F30-34

47

25.2M→Finish

25.2 - 26.2 mi

Top 33%
×1human
+17ft-12ft

Overall

807

Females

257

F30-34

59

Passing Analysis

Category:
Athletes Passed
269*
Passed By
110
Net Change
+159
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#715
5K → 10K813+78#715#637
10K → 15K275+22#637#615
15K → 20K10*15-5#615#620
20K → Half11*4+7#620#613
Half → 30K64*16+48#613#565
30K → 35K36*18+18#565#547
35K → 25.2M34*41-7#547#554
25.2M → Finish6*8-2#554#556
TOTALS269*110+159

* Includes athletes who did not complete a segment (DNF/DNQ).

📊

Passing Visuals

Category:
Loading...

🔄Passing Circle

Loading...

🌊Position Flow

Loading...

🏃Race Lanes

Loading...
🏆 Finisher Certificate
Download or share your official race finisher certificate
Loading certificate...

Your certificate is generated on-demand and can be shared on social media or saved for your records

Upload your GPX file

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

.gpx files up to 10MB

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

Public Race Data

J & A Racing

J & A Racing

Big River Race Management

Big River Race Management