The head of a Thunder Bay mountaineering club says climbers are struggling to access routes in the Fort William First Nation.

Frank Pianka said the First Nation has posted "No Trespassing" signs across a number of popular paths in the Nor'Wester mountains.

Pianka said the local chapter of the Alpine Club of Canada met twice with representatives from Fort William First Nation, but hasn't received an official response to their concerns.

Frank Pianka

Frank Pianka of Thunder Bay's Alpine Club of Canada says the club met twice with representatives from Fort William First Nation, but hasn't received an official response to their concerns. (Supplied)

"We have been totally ignored," he said.

"There's been no formal communication. I can't show you a ... single letter from Chief and Council."

The Fort William First Nation declined CBC News's request for an interview, but in an email response, communications officer Kristy King said the matter is still being discussed among band councillors.

"This topic/agenda item is still at the council level," she wrote. " We are currently communicating with the interested parties and hope to have this resolved soon."