CARRABASSETT VALLEY – Two skiers from Oxford were rescued Thursday on the back side of Sugarloaf Mountain after skiing beyond the resort’s boundary and getting stranded overnight, said state and resort officials.

A state game warden pilot spotted Bradley Snow, 16, and Sven Bergeron, 20, about 7:30 a.m., after the warden service plane joined rescue workers on snowmobiles in a search that lasted eight hours.

The skiers, uninjured, were taken down the mountain by snowmobile, said Deborah Turcotte, spokeswoman for the Maine Department of Inland Fisheries and Wildlife.

It was the second rescue in that area of the mountain since the ski resort opened its new glade terrain there last month.

Snow and Bergeron would have been difficult to find without the plane, said statements released by game wardens. They had built a shelter with snow and fir boughs to stay warm overnight.

The two had no cell phones; rescuers based their search on where skiers have been lost in the same area, said warden service Sgt. Scott Thrasher.

More than a foot of snow fell on the mountain Wednesday and until 1:30 a.m. Thursday, with temperatures dipping to single digits, according to the warden service. The most recent snowfall added to snow depths that reached 5 feet in the search area.

Snow and Bergeron skied Wednesday near a ridge line between Sugarloaf and Burnt mountains. They told wardens that around 2 p.m, they followed another skier’s tracks past orange ropes marking the resort’s boundary.

They couldn’t get back to the resort after passing over the ridge line, game wardens said.

The search started after Snow’s mother reported them lost on the mountain around 11 p.m., said Ethan Austin, a Sugarloaf spokesman. The ski patrol and game wardens used snowmobiles to search the area, but it was too dangerous to send out searchers on skis, he said.

The plane was called in at 7:30 a.m., Turcotte said, and the pilot saw the pair within 10 minutes.

Game wardens on snowmobiles got within a quarter-mile of the skiers and had to snowshoe the rest of the way, reaching them at 8:35 a.m., Turcotte said.

They were taken to West Kingfield Road on snowmobiles and evaluated by NorthStar emergency medical services around 9:30 a.m. before being picked up by their parents, game wardens said.

They admitted to slipping under a rope that marks the resort’s boundary, according to Thrasher.

Sugarloaf marks the glades section’s boundary with orange discs and ropes, said Austin. Ropes were added after a skier got lost last month.

Cody Martel, 24, of Orono told game wardens that he didn’t see boundary markers when he got lost in the same area on Jan. 20, the opening day for the new terrain.

Martel used a cell phone to give rescuers his location and was rescued just before midnight, after a seven-hour search.

A warning sign was added this year at Brackett Basin, the “only entrance” to the glade area, Austin said. It notes the boundary and other safety suggestions, such as skiing with partners, he said.

Turcotte and Austin could not say how much either rescue cost.

Sugarloaf has not decided on revoking ski passes for recent rescues, Austin said. The resort has charged for rescues in the past.