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Date:
Sun, Dec 13, 2026 at 7:15 AM
Location:
3377 East Swallowtail Lane
Pima County, Arizona
85739
United States
OpenStreetMap Google Maps
Links:
aravaiparunning.com Register at raceroster.com
Tags:
21k 42k 50k Marathon Run Ultra

SUNDAY, DECEMBER 13, 2026

Biosphere to Oro Valley, AZ

Net downhill courses along the foothills of the Santa Catalina mountains run since 1969. The full Marathon, 50K & Marathon Relay start at Biosphere 2 near Oracle and run down past Catalina, through Oro Valley and finishing at Pima Community College Northwest Campus. The full marathon has net elevation loss of 1,493 feet and is a Boston Qualifier with NO TIME PENALTY.

The Half Marathon starts at Golder Ranch Fire Administration in Catalina and runs down through Oro Valley, join The Loop Bike Path next to the Cañada del Oro to the finish at Pima Community College.

Join us for beautiful winter weather and a fast downhill courses!

Marathon & Marathon Relay Courses

The marathon runners line up at the spectacular and storied Biosphere 2 near Oracle, AZ running on some rolling hills until the course reaches Oracle Road / SR 77. Traveling along the majestic Santa Catalina Mountains, through the quaint towns of Catalina and then down into Oro Valley, the course brings the runners along the Canada del Oro River Bike Path to the new finish at Pima Community College Northwest Campus. For those who do not want to tackle the longer distances, the Marathon Relay requires four runners, each running a proportionate leg of the marathon course. (60 Team Limit)

Half Marathon Course

The Half Marathon now starts at Golder Ranch Fire Administration Building (former finish) and follows the second half of the marathon course into Oro Valley and along The Loop bike path. Both the Full and Half Marathon events are USA Track & Field certified and all results are sent directly to Boston.

50K Ultra Course

The 50 kilometer course is now USATF Certified and follows the Marathon course with a new addition extending to Ted Walker Park and back on The Loop bike path.

Packet

Packet Pickup

Friday, December 11, 2026

3:00pm - 6:00pm

Aravaipa Running

2401 S. 24th Street

Phoenix, AZ 85034

or

Saturday, December 12, 2026

11:00am - 6:00pm

Pima Community College -

North West Campus

7600 N Shannon Rd,

Tucson, AZ 85709

0000 North Oracle Road, Tucson, AZ 85704

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    Routes

    See the Half Marathon course here.

    See the Quarter Marathon course here.

    See the 5K Run/Walk course here.

    2026 Planned Race Weekend Schedule

    Friday, March 5, 2027

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