Yellowstone Times

Open burning season began March 1st.  Simply obtain a Park County Burn permit at this link:  https://app.egovmt.com/cgi-bin/burnpermit/burnPermit.cgi and activate it on the day of your burn to let the fire department know what you have planned.  No additional permits or notifications necessary.  Fire departments may close open burning due to conditions should it become necessary.  You are responsible for any fire you start.  Take care and always have the means available to extinguish your fire.  Any questions, call your local fire department or the Fire Warden at (406) 823-0823. 

Original source can be found here.