2026 Mac Forest Trail Run

The 29th Mac Forest Trail Runs will take place on Saturday, March 14th, 2026, in Corvallis, Oregon, at Oregon State University's McDonald Forest. The event will feature trail running on single-track paths and logging roads, with weather conditions expected to be cool and potentially wet, typical of early spring in the Pacific Northwest. Participants can anticipate a challenging 15k course with approximately 1,450 feet of elevation gain, as well as a shorter 5k option, both offering scenic views of the Cascades, Coast Range, and Soap Creek Valley on clear days. Aid stations will be available at Cronemiller Lake and the Cap House, and the course may be altered on race day due to weather or trail conditions.

What distances are available for this event?

• →15k race starting at 9:00 AM
• →5k race starting at 9:30 AM

How much does registration cost?

• →Adults (19+): 15k - $40 | 5k - $30
• →Youth (18 & under): 15k - $20 | 5k - $15 (50% discount)
• →Price increase: +$5 for all registrations after January 15th, 2026

When does registration open and where can I register?

• →Registration opens on November 26th, 2025
• →Register at UltraSignup ↗

Can I register on race day?

• →Yes, race-day registration is available (cash or check only; checks payable to "Oregon Running Foundation")
• →Bib pickup and registration start at 7:30 AM on race morning

Are there any restrictions on the race course?

• →No dogs or strollers permitted on the course

What is included in the registration?

• →Race shirt (order by February 1st, 2026 for guaranteed race-day delivery; limited quantity available for purchase morning-of)
• →Access to aid stations at Cronemiller Lake and the Cap House
• →Participation in a cupless race (participants must bring their own reusable cup or hydration)

What is the cause of the event?

• →Proceeds support local high school cross-country athletes and the Oregon Running Foundation's mission to empower youth through running

What should participants expect in terms of weather?

• →Weather in Corvallis on March 14th, 2026, is expected to be cool and potentially wet, with typical early-season Pacific Northwest conditions
• →Expect mud and wet conditions on the course

Is there a limit on the number of participants?

• →Yes, participant limits apply — early registration is recommended

Are there any refund or transfer policies?

• →No refunds or transfers are available
• →Credit may be offered for next year's race in case of cancellation