The two men, both aged 25, were reported missing yesterday evening by one of their wives after they failed to return home.
They were reportedly spotted by other climbers off-route on Sunday afternoon at 2 p.m. PT, but did not need help at that time.
Rescue crews are planning to head out around 6:30 a.m. PT Monday to locate and rescue the two men.
The rescue crew did make voice contact with the climbers on Sunday night, but they have not been able to contact them by cellphone.
The team said the pair are in a challenging area with ice and snow. Even in the summer the route is considered a challenging full-day hike in steep and rugged terrain.
The volunteers with North Shore Rescue also had to rescue climbers on Crown Mountain on Saturday, and Sunday using a helicopter.
The body of mining hiker Liang Jin was recently found in the same region of the North Shore Mountains.
Google maps: Crown Mountain