If you are looking for something fun and challenging there are a few concrete slab pulls throughout the summer and early fall in central Mass and southern NH. The next pull is at the Cheshire Fair grounds ( http://www.cheshirefair.org/ ) in Swanzey, NH on August 5th. You can find the setup rules here http://static1.squarespace.com/static/554252f8e4b0376dfa63358e/t/576408d98419c28ad941d814/1466173659249/Tractor-Pulls-LG%2B2016.pdf . This type of pulling consists of pulling a steel sled weighted with concrete blocks on a concrete slab, we run 4 classes, 900lb, 1200lb 1500lb and 1800lb. the 900lb class has been known to pull 5000lb's + the full pull distance of 6'. If your interested come check it out, it can be entertaining. I know there are a few others I pull with who post here, please feel free to comment or ask questions and I'll answer what I can.