A plan to add additional runs to Granite Peak Ski Area is facing opposition from some residents.

A group that aims to halt a 150-acre expansion at Granite Peak Ski Area is ramping up its efforts to spread the word about perceived pitfalls of the plan.

The Leave Rib Mountain Alone public Facebook page has attracted nearly 500 likes so far. The group already has gathered more than 2,300 signatures on a change.org online petition, says Nancy Anderson, a key member of the group.

At an informational meeting for the group’s supporters this week, Anderson encouraged residents opposed to the expansion to spread the word about the petition by going door to door to gather additional signatures.

RELATED: Granite Peak expansion continues

Granite Peak owner Charles Skinner revealed plans for a ski expansion more than a year ago. That plan calls for adding several intermediate-level ski runs, meaning swaths of trees would be cut down and some existing hiking trails altered. The expansion also paves the way for future on-site hotel rooms, which Granite Peak now lacks.

The plans have drawn mixed reviews, including criticism from those who think the remaining natural areas on the mountain should be left alone.

The ski resort has been tweaking its plans in response to neighbor concerns, Granite Peak officials say, and have not yet revealed a final version.