Relatively easy trails and only some are for mtn bikes. Ride along the lake using "lakeside trail" and some single track trails shoot off and make for some slightly more challenging but still rather easy trails. Some smaller rocks and roots on trails but a smooth line can usually be found.
North of York and South of Harrisburg. Along pa rt.177
http://www.singletracks.com/item.php?c=1&i=6986