One of three campgrounds within the beautiful Long Sault Parkway, Mille Roches is comprised of two islands surrounded by a dense forest, mature trees and active wildlife. Wake up to a peaceful and serene setting that offers seclusion and privacy, perfect for campers looking to unwind and relax. Mille Roches is known for its’ popular camping cabin and has the largest sand beach on the St. Lawrence corridor.

Dates of Operation

May 17 to September 15, 2024


Please see each location for the scheduled programming activities, which may differ at each campground. 


  • Sunset Cini Cabin
  • Premium Waterfront Sites
  • Regular Sites
  • Electric-only Sites
  • Recreation Vehicle Sites
  • Macdonell Island/Lock 21 - Regular Sites
  • Trailer Dumping Station
  • Showers
  • Washrooms
  • Retail Store/Registration
  • Picnic Areas and Food Concession at Mille Roches Beach and Picnic Area
  • Boat Launching


Scuba Diving
Children's Programs
Lost Villages and Save Ontario Shipwrecks Info Centre

Click here for a list of beaches that are currently posted. Each posting has a description of the beach water quality which helps determine whether specific locations are suitable for swimming.

Nearby Attractions

  • Upper Canada Village
  • Upper Canada Golf Course
  • Crysler Park Marina
  • Upper Canada Migratory Bird Sanctuary
  • Shopping in Cornwall and Morrisburg
  • Cycling on the Waterfront Trail
  • Lost Villages Museum


15805 Long Sault Parkway, Long Sault,

Ontario K0C 1P0

Park Rules

For a complete description, please refer to the St. Lawrence Parks Commission (SLPC) Act.

Be tick smart this summer. Click here for more information.