This info and maps comes from a trail builder I met. I will add more info soon but here's what I have from him.<br />
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The trails have a beginner loop(green) about 2.5 miles closest to the lake and intermediate loops(yellow) about 5 miles but will ride as more. The intermediate loops have more climbing than your typical trails and are basically 2 loops joined by a mile of trail that links them together and that takes you on the road for about 40 ft around a private driveway. There are also 5.5 miles being finished across the street from the lake parking area. Closed for hunting Sept Through Feb except on Sundays.
Rainbow Lake<br /><br />5, Emmitsburg, MD 21727
http://www.singletracks.com/item.php?c=1&i=8940