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As of Tuesday, March 12th at 9:00am this event has officially sold out!  

Thank you so much for your amazing support. 

No additional registrations will be taken, 

including at packet pickup or the day of the race.

Join StartLine Racing as we continue a March tradition!

The Tucson Shamrock Half Marathon, 10K, 5K 

presented by First Watch will take place on Saturday, March 16th at 

Crossroads at Silverbell District Park in Marana.


Virtual Run Details

Of course we want you to participate in the Tucson Shamrock Half Marathon, 10K and 5K event locally but we understand things come up.  

So, if you can't join us on race day and still want to run, get the medal and shirt then you still can!  

Here is your chance to take part in this event no matter where you are!  

And of course, all prices include shipping!  Please note that all items will ship following the event on March 16th.

Virtual Registrations are restricted to US addresses only.  

If you reside outside of the US and wish to participate please contact StartLine Racing at

Registration fees

Virtual Run Closed

  1. $35.00
    Oct 17 - Mar 12

Half Marathon Closed

Registration closed
    1. $60.00
      Oct 17 – Dec 31
    2. $70.00
      Jan 1 – Jan 31
    3. $75.00
      Feb 1 – Mar 12

10K Closed

Registration closed
    1. $35.00
      Oct 17 – Dec 31
    2. $40.00
      Jan 1 – Jan 31
    3. $45.00
      Feb 1 – Mar 12

5K Closed

Registration closed
    1. $30.00
      Oct 17 – Dec 31
    2. $35.00
      Jan 1 – Jan 31
    3. $40.00
      Feb 1 – Mar 12

Thank you to our Sponsors!


Mail-in Registration Form

To register by mail please complete and return our Mail-in Registration Form!  Please make checks payable to StartLine Racing.

What You Get!

- Custom Event Medal.

- Choice of Custom Event Dri-Fit Racerback Tank or 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:

  • 8 & Under, 9 & 10, 11-13, 14-17, 18-24, 25-29, 30-34, 35-39, 40-44, 45-49, 50-54, 55-59, 60-64, 65-69, 70-74, 75 & Over

- Pre- and Post-Race "Runner's Brunch" (bagels, 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!

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Race Day Information

  • Race Day Registration will be available beginning at 6:30am.  There will be no race day registration.

  • We accept cash, check, and credit cards on race day  

    • Race Day prices:
      • Half Marathon - $80
      • 10K - $50
      • 5K - $45
  • Strollers welcome

  • Leashed pets welcome 

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

Course Information

  • There is a 4 hour time limit on the half marathon course.

  • The course will take you through dedicated running trails (all asphalt and concrete), starting and ending at Silverbell Park in Marana - 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.

Water and Gatorade will be located at:

  • Half Marathon: Miles 1.55, 3.1, 4.53, 5.57 (northern turnaround), 6.61, 8.04, 9.59, 11.07, and 12.05.
  • 10K: Miles 1.55, 3.1 (turnaround), and 4.65
  • 5K: Miles 1.55 (turnaround)

GU Gels will be available at miles 6.61 for the half marathon participants

Restrooms will be located on the course at miles 2.4, 8.74 and 11.07

  • Note: The restrooms at mile 11.07 will be located off the course at the start/finish line area (approximately .1 miles off the course)

Course Maps

Half Marathon




Training Programs

Fleet Feet Tucson is excited to offer 5K, 10K and Half-Marathon training to get you ready to race! Training programs start on December 8th and January 5th and are open to all levels. Please email or call 520-219-2323/520-886-7800 for more information or to sign up. 


Packet Pick-Up Opportunities

  • Packet Pick-up is available on Friday, March 15th from 3:00 - 6:00pm at Fleet Feet Sports in Oro Valley (map). 

    • Fleet Feet is located at 7607 N Oracle Road in the Oracle Crossings Shopping Center.

  • Race Day Packet Pick-Up will be available beginning at 6:30am.

Check out our other Tucson events!

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Event Schedule

  • March 15 3:00 PM - Packet Pick-Up from 3-6pm at Fleet Feet Sports in Oro Valley

  • March 16 6:30 AM - Race Day Packet Pick-up Opens

  • March 16 7:30 AM - Half Marathon Begins

  • March 16 7:45 AM - 10K Begins

  • March 16 8:00 AM - 5K Begins

  • March 16 9:00 AM - Award Ceremony Begins (approx)

Contact Information

Event Location

Crossroads at Silverbell District Park, North Silverbell Road, Tucson, AZ, United States

Click here to view map