Questions ‘dismissed
Cairngorm National Park Authority is also opposed to the application and tourism organisations have voiced their concern on the visual impact it would have.
A consultation exercise on the issue also saw more than 17,000 representations received.
Ronald MacLean, of campaign group Pylon Pressure, said opponents had fought long and hard for a public inquiry on the line, which would cross the national park and pass within sight of the Wallace Monument in Stirling.
“We are also glad an opportunity to be heard will be given to the questions that were originally dismissed by Scottish and Southern Energy,” he said.
Ian Paterson, of Stirling Before Pylons, said concerns about health and the impact on the landscape had been raised, as well as the possibility of underground cabling.
He said: “We hope these points will be fully covered in the public inquiry.”
Eleanor Scott, Green MSP for Highlands and Islands, described the inquiry as a valuable opportunity.
She added: “The upgrade does need to take place – in a careful and considered way – if Scotland is to make the most of its renewable energy resources and make our own contribution to tackling climate change.”