The Red Path is a less known way to hike to Mt. Katherine in Wonalancet. Oddly enough, the Red Path is marked with blue blazes. It is well marked but some care needs to be taken to follow the path, particularly in the lower section which follows a dirt road for a bit. You might consider returning on it after hitting the junction at Tilton Spring and then walking back up Ferncroft Road to the parking lot.
The cache container is a camouflaged bison tube.