The phrase "challenging path" refers to a difficult or demanding course of action, often involving obstacles and requiring great effort. Full definition
I listen to my heart and am reminded of why I have chosen the more challenging path. (attachmentparenting.org)
Leach argues that «federal climate policy backstops put a stronger foundation under the Alberta plan and, with the Alberta plan in place, there is a credible although still very challenging path for Canada to meet its 2030 target. (macleans.ca)
«Entrepreneurship is a very challenging path. (inc.com)