From the NCC Gatineau Park website:
Gatineau Park will be hosting the Gatineau Loppet this weekend. The trails will not be closed to recreational skiers during this event, however competitors should have priority. Please avoid using parking lots P1 (Asticou), P2, P3, P5 and P6. For more information: www.gatineauloppet.com.
Please note that during the Gatineau Loppet, Huron shelter will be occupied day and night by a group of Canadian Cadets.