You heard of traildamage.com? Check it out for a ton of CO (and surrounding states) trails. You know where Eagle Rock and Saran Wrap are, right? Further out Old Stage Road are a few more trails but I haven't been there in a while... CRXs do not fare well off-roading.
I have a 79 4x4 in my shop right now but it'll be gone in a few days. I'll clean up and get organized for your Runner next month! 8)
>>Dan