I shot in the Smuggler's Notch Biathalon a few years ago and it was a lot of fun. I was a little intimidated by just how serious the competitors might be, but there was a broad spectum of individuals involved. If you're serious, you can be serious and see just how you compare, or you can relax and just enjoy...
I followed a trail of "stuff"...caps, knife a piece of fur...finally met up with a young boy from NH headed back down the trail looking for his knife. He was escorting his father as a spare ram rod packer. I ended up walking and talking with another starter in front of me comparing how sore our butts were.
There's something for everyone.
I just wish it wasn't so darn far to drive.