(Press Staff Photo by Geoffrey Plant) Joanna Mast hikes out of Silver City along Little Walnut Road, which leads to the Continental Divide Trail and the Gila National Forest. Mast, who aims to hike the Continental Divide Trail all the way to the U.S.-Canada border, began her journey at Camp Crazy Cook near the Mexican border April 19. It’s that time of year again: Solo hikers and groups of backpackers are passing through Silver City on their way north following the 3,100-mile Continental Divide Trail — approximately 800 miles of which is in New Mexico. “The CDT will be my triple crown,” said Joanna Mast, a Denver, Colo., resident who has previously hiked the entire lengths of the Appalachian and Pacific Crest trails. “I’m going the whole way.”