Can you share the location?
I can. The hotel and machinery are atop Echo Mountain. The most noteworthy trails we hit were Middle Sam Merrill and Sunset Ridge. They're some of the best trails in Socal. However... and I'm not trying to be morbid... only consider it if you're an experienced and skilled rider. Fatalities are not unheard of. The most recent was only a month ago. If your goal is just to visit Echo Mountain, then there's a moderate six mile hike that you can knock out in a few hours.