Pull up the YUTC map, these sections are on the map, but not part of the YUTC course.http://www.neotrail.org/yutc50Kcoursemap.html
Both Big Bear and Lily Pond are on the West or left side of the map.
Big Bear is about in the middle of the map and follows Cascade Run stream, always a beautiful section of trail. Go left at the fork up to the top of big bear cross the bridge hop back on the trail on the left and bear to the right on the trail take to the bottom and turn left, now you are back on the YUTC course.
Lily Pond is north of Bears Den just less than 1 mile from the log Cabin. When you get to the last hill on the YUTC course don't go up it turn left and go around the pond, when you go thru the parking lot go up the hill to the right. After about .5 mile turn left at the 4 way intersection and you are back on the YUTC course trail. .8 miles from the cabin.
It is a URINEO tradition to reverse direction after each loop from the cabin. The 7AM start will start in the same direction as YUTC. Clockwise on the map.