Each Tuesday in May is “2-Fer Tuesday”... get two (2) Adult Season Passes for just $50 and/or two (2) Child Season Passes for just $20! To purchase your Season Passes, come to our Box Office at 2198 Riverside Avenue, Paso Robles... or call 1-800-909-FAIR. CMSF Box Office is open from 9:00a – 4:00p Monday through Friday. Promotion good ONLY on Tuesdays in May – May 7, May 14, May 21 or May 28. Season Passes allow for entry into the Fair each of the 12 days. The promotion is not good in conjunction with any other offers or discounts.