Membership Form First name Last name Email Phone (optional) USDF number Birth date Membership OpenAdult amateur/Young rider (18 and over)Junior See amateur conditions and rules. I have read and agree to the terms. Address Street address City State Zip Local chapter Please Select oneLes BoisMagic ValleyWood RiverEastern IdahoIDEA - state member only See the Additional Member form to add additional members - those in the same household, under the age of 21.