The unidentified representative said the 32-year-old from Ottawa, Ontario, is recuperating from her journey at the South Pole research station, Amundsen Scott Station, The Ottawa Citizen reported Saturday.
By the time she completed her journey to the planet's southern-most point Friday, McGrath covered nearly 684 miles in 46 days. She spent eight hours trapped in a crevasse early on, suffering bruised ribs.
McGrath's accomplishment follows her 2008 record of becoming the first Canadian woman to climb the so-called Seven Summits, or the highest peaks of each continent.
The Citizen said McGrath, a Canadian Forces member, previously helped rescue a Nepalese climber on Mount Everest and also has reached the North Pole.