 Colton Point State Park has some challenging hikes in and around the Grand Canyon of Pennsylvania , with 4 @.@ 0 miles ( 6 @.@ 4 km ) of trails that feature very rugged terrain , pass close to steep cliffs , and can be very slick in some areas . Governor Robert P. Casey took a hiking tour of the park in July 1990 , and in 2003 the DCNR reported that 18 @,@ 239 people used the trails in the park . 
