2026 Tucson Shamrock Half Marathon / 10K / 5K

To register by mail please complete and return our Mail-in Registration Form! Please make checks payable to StartLine Racing. Mail-in registrations will be accepted until March 2, 2026.

Of course we want you to participate in the Shamrock Half Marathon, 10K and 5K event locally but we know things come up. So, if you can't join us on race day and still want to run, get the medal and the shirt then you still can! Here is your way to take part in this event no matter where you are! And of course, all prices include shipping! Prior to the event all virtual participants will receive an email with instructions on how to submit your time. Please note that all items will be shipped following the event on March 8th.

Virtual Registrations are restricted to US addresses only. If you reside outside of the US and wish to participate please contact StartLine Racing at info@startlineracing.com

Custom Event Medal.

Choice of Custom Event Tech Shirt for all participants. 

Age Group Awards for Top Three in all Age Groups for the half marathon, 10K and 5K (Race day participants only). Our age groups are the following:

Pre- and Post-Race "Runner's Brunch" (granola bars, fruit, water, Gatorade, etc)

Chip Timed with Real Time Results and Photos on our Website or Mobile App (on Apple and Google)

Owned and operated by StartLine Racing!

Please note any race related items (shirts, medals, etc.) will NOT be mailed to those that do not attend.

The 5K distance will feature a 'Chase the Leprechaun' for 2026! A leprechaun will be set loose on the course for all of our participants to find. Any participant to pass the leprechaun and finish the race will receive a prize at the finish line. No additional registration required. Open to all 5K participants.

Race Day Registration will be available beginning at 6:30am.

We accept cash, and credit cards on race day (checks are no longer accepted)

Race Day prices:

• Half Marathon - $90
• 10K - $60
• 5K - $50

Strollers welcome

Leashed pets welcome

The course will take you through dedicated running trails (all asphalt and concrete), starting and ending at Brandi Fenton Memorial Park in Tucson - meaning no need for transportation before or after the race just to get back to your car! Please note - this is an open use trail system and does not close for our event.

Due to the common start/finish line, there is no bag check for this event.

This event will take place rain or shine. There are no refunds for due to weather.

The time limit for the Half Marathon course is 4 hours.

Restrooms will be located on the course at:

• Half Marathon - Miles 3.11, 5.1, 8.1, and 10
  • Restrooms at Miles 3.11 and 10 will be at Rillito Regional Park (restrooms directly next to the running trail)
  • Restrooms at Miles 5.1 and 8.1 will be at Children's Memorial Park (restrooms directly next to the running trail)
• 10K - Mile 3.11

GU Gels will be located on the course at:

• Half Marathon - Miles 5.1 and 8.1

The cut-off time for the Half Marathon will be 4 hours

Packet Pick-up is available on Saturday, March 7th from 2:00 - 5:00pm at Road Runner Sports (map).

• Road Runner Sports is located at 7113 N Oracle Rd, Tucson, AZ 85704

You can also pickup your packet on race day starting at 6:30am.

Event schedule 

•  
  Sat, March 7, 2026 5:00 PM - Packet Pick-Up from 2-5pm at Road Runner Sports
•  
  Sun, March 8, 2026 6:30 AM - Race Day Packet Pickup and Registration Opens
•  
  Sun, March 8, 2026 7:30 AM - Half Marathon Begins
•  
  Sun, March 8, 2026 7:45 AM - 10K Begins
•  
  Sun, March 8, 2026 8:00 AM - 5K Begins
•  
  Sun, March 8, 2026 9:00 AM - Award Ceremony Begins (approx.)