If you are coming to the jam check in at the front desk and they will direct you to where the jam is being held. If you are riding that day you will need to sign a waiver. You can find more information on the waiver on the Lumberyard website. You can fill out a waiver in advance if you want. Click here to do that.
You don’t have to sign the waiver online. You can sign it at the front desk when you get there.
Here’s a map to the Lumberyard.