Here is a list of trails that I have run with baby 33 inch tires and about 5 inches of lift.
(1) Pritchett Canyon - Easter Jeep Safari Rated 5 (official scale of 1 to 4)
(2) Behind the Rocks Backwards - Easter Jeep Safari Rated 4+ (The EJS goes down the two most difficult hills)
(3) Metal Masher - including Widow Maker and Rock Chucker Hill
(4) Dump Bump & Potato Salad Hill (easy line)
(5) Hells Reveng - including Mickey's Hot Tub and Excalator
The only place that I have really had a ground clearance issue was one of the waterfalls on Pritchett Canyon where I pushed my front tires into the air due to my break over angle (extended cab 85). Gotrocks had no problem in his runner with 37's.
I don't always take the absolute hardest line, but I rarely take a strap.