04/10/2013 11:54 EDT | Updated 06/10/2013 05:12 EDT

Rock slide damages historic B.C. rail trestle, closes Myra Canyon trail

KELOWNA, B.C. - A rock slide has damaged a trestle along the historic Kettle Valley Railway, closing the popular Myra Canyon Trail south of Kelowna, B.C.

Officials with BC Parks are assessing the damage and it's not known when the popular hiking and biking trail will reopen.

Myra Canyon Trestle Restoration Society director Ken Campbell describes the slide as catastrophic.

He says the springtime freeze-thaw cycle pried several boulders from the rock face above one trestle, and the resulting slide was very destructive.

All other trestles and pathways along the trail are also being inspected for any damage.

The century-old Kettle Valley Railway, including more than a dozen soaring rail trestles through the Myra Canyon, has been dramatically upgraded over the last decade since a wildfire destroyed 12 of the historic wooden spans and damaged two steel trestles. (CKFR)