May 19 and 20, 2017 Hey folks thanks for your interest in attending hidden in the hollow. Fill out the form below if you would like to attend hollow year 5 May 19th and 20th, 2017. Invites will go out via email and will be sent out on Tuesdays and fridays. Watch your email and we hope you see you out there! ATTENTION YAHOO MAIL USERS - YOU MUST ADD HOLLOWFEST@GMAIL.COM to your contacts or yahoo will reject your invite. I don't know why but every yahoo email we receive doesn't work.