Wow - can't believe it took me this long to find this thread! Before kids showed up, I did most of the enduro type races. 24 hours of Snowshoe, Big Bear, Moab, etc. I routinely ride 20-25 miles a week at Patapsco. Glock_45 usually joins me.
I grew up mountain biking in Colorado - but Maryland has a fantastic MTB scene. Patapsco is one of the best maintained trail systems I've ever ridden - and that includes the stuff in CO and Utah. Patapsco can be as easy or as technical as you want. Good downhills, rock gardens, twisty singletrack, lung busting climbs - it has it all. Everything is single-speed rideable, but it will challenge you. I know that place like the back of my hand, so if you ever want to get out there - shoot me a PM.
As for bikes, I'm a huge Titus fan. I love titanium - being 6'4" tall usually requires some custom fitting, so that's one big reason I stick with Titus. My x-country bike and my single speed are both Ti, but my downhill rig is aluminum.
Splitter - you weren't supposed to mention that... You now owe me beer.
I'd be up for that, too. I'm experienced, but by no means do I have 20-25 miles left in this old bod.
We need to do a mdshooters ride. One that is "ride at your own risk" type of ride. Most here are of that self-reliant bent, but some a-hole might think otherwise.
I'll do the off-the-back sweep, k?
Doug