OTTAWA -- Stephen Harper is set to embark on his annual trek to the North, his ninth time doing so since becoming prime minister.

The Prime Minister's Office says this year's trip is meant to showcase the science, technology and research that are underway in the North.

Before he starts his trip, Harper will make a pit stop in British Columbia, first to meet business leaders in Chilliwack and later to speak at a $35-a-head summer barbecue for the Conservative riding association in Langley.

His northern tour gets underway Thursday in Whitehorse at another Conservative party event. The Whitehorse Daily Star reports the Yukon Conservative Association has sent out around 3,000 invitations to its members and others.

The Conservative party website says the Yukon event will be held Thursday evening at an undisclosed location. Buses will shuttle people from an old Shell gas station on the Alaska highway to the site.

The Prime Minister's Office says Harper is also supposed to make an announcement about northern science and research while in the Yukon.

Then he's off to Fort Smith, N.W.T., to make announcements about developing agriculture in the North before heading to Nunavut, where he'll visit Cambridge Bay, Pond Inlet, Iqaluit and York Sound. He'll also take part in the military's Operation Nanook exercise aboard a naval vessel.

"During the prime minister's ninth annual northern tour, the prime minister will build on our record in the North, showcasing the science, technology and research that is transforming the North, improving living standards and creating jobs as he travels to Yukon, the Northwest Territories and Nunavut," Harper spokesman Jason MacDonald wrote in an email.

Harper's trip comes as the federal government is being sued over funding for a land-use plan that would guide resource development in Nunavut.

The Nunavut Planning Commission has filed a lawsuit in Federal Court, accusing Ottawa of trying to interfere in the plan's development and to block its final steps.

The Nunavut Planning Commission was created out of the 1993 Nunavut Land Claim Agreement. The commission was charged with designing legally binding plans that would lay out which lands would be protected, which would be open for development and how they would be managed to encourage local control and economic progress.

Aboriginal Affairs Minister Bernard Valcourt's office says the government has provided $3 million a year to the commission for the last 18 years.