Custer Area Chamber of Commerce issued the following announcement.
6th Annual Sound of Silence Tesla Rally
Date: MAY 17 - MAY 19
To register for the 6th Annual Sound of Silence Tesla Rally: https://visitcuster.regfox.com/tesla-rally
The Custer Area Chamber of Commerce is excited to host the 6th Annual Black Hills Sound of Silence Tesla Rally!
On Friday night there will be a Tesla Mixer with free food and beverages. Saturday morning will be on your own to ride the Hills and enjoy the beautiful scenery of the area. Saturday afternoon will be the annual group photo at Crazy Horse Memorial. Then Saturday night is the Sound of Silence dinner at Pizza Works.
It's Open House Weekend at Custer State Park so it's free to drive through all weekend.
Each driver registration will receive $10 in Custer Cash, a 2019 Tesla Pin, and a Crazy Horse Memorial dash ID that will get you free entrance all day on Saturday.
Original source can be found here.