Recently I was able to participate in a hike up to the Trilobite beds located on Mt Stephen near Field, B.C.
Thes Burgess Shale Foundation runs several hikes in this area. The Burgess Shale is a UNESCO World Heritage site. It is known for it's extensive fossils of the Cambrian period I believe.
There is a very good exhibit at the Tyrrell Museum on the Burgess Shale.
I thought I put a link in here to some pictures of the hike. Continue