Four days after a man and a woman from Boston were presumed dead in an avalanche while snowshoeing in a national park in Canada, their bodies were recovered Friday in deep snow, authorities said.

The victims, who had gone snowshoeing at Banff National Park, near Lake Louise in southern Alberta, were identified only as two 32-year-olds from Boston.

“Our privacy laws in Canada are such that we do not provide the identity of a victim in an accident such as this,’’ Corporal Curtis Peters, spokesman for the Royal Canadian Mounted Police, said during a press conference Friday evening.

The pair are the first avalanche fatalities in a Canadian national park this year, according to Parks Canada, the agency that oversees the park system.

The bodies were buried in 6.5 feet and 10.5 feet of snow, respectively, in an area that is prone to avalanches, authorities said.

A rescue team first spotted one of the bodies Tuesday afternoon, the day the pair was reported missing.

But extreme weather conditions prevented rescue teams from approaching them, authorities said.

“It’s not a good feeling,’’ Grant Stantham, the incident commander on the rescue team, said during the press conference. “You see someone there and you can’t reach them.’’

A vehicle rented by the pair was found at the Mount Hector trailhead on Highway 93 North later that Tuesday around 3 p.m., according to RCMP.

“Snow cover on the vehicle and in the parking lot indicated that the car had been parked there for some time,’’ the Royal Mounted Canadian Police said in a statement.

The hazards and other weather issues continued through the next few days, including a “historical avalanche cycle’’ Thursday, Stantham said.

On Friday morning, conditions were deemed safe enough for a rescue team to attempt a recovery.

Around 8:30 a.m, a team descended by helicopter into the area.

The bodies were located in about 10 minutes using avalanche transceivers, or radio beacons, Stantham said.

Rescue teams dug through the mass of snow and ice for about 90 minutes before finding the bodies, Stantham said during the press conference.

The two were “properly equipped’’ for a backcountry trek through the park, Stantham said.

“They had avalanche transceivers on, which is how we found them,’’ Stantham said.

“I’m sure they knew they were traveling in avalanche terrain.’’

Authorities believe the two were caught in the avalanche Sunday.

The daily avalanche forecast for that day was rated “considerable’’ — i.e., “dangerous,’’ Stantham said.

The victims were last seen Saturday having breakfast in Field, British Columbia, police said.

Authorities launched a missing persons investigation Tuesday after hotel staff reported to RCMP that two guests had not checked out of their room as expected Monday, and that the room appeared untouched.

“The contents of their room indicated that these were backcountry recreationalists,’’ Stantham said.

Nicole Fleming can be reached at nicole.fleming@globe.com.