The Mont O'Brien Association was established in the year 2000, with the purpose of protecting flora and fauna on the Mont O'Brien public territory.

In 2003, members built a right-of-way access road to Mont O'Brien, as well as the Mary Haydon Hiking Trail to lookouts on the Mont.

Members decided to ask the Québec government to establish the territory as a biodiversity reserve, and in 2008, the Projected Biodiversity Reserve was officially established.

In 2022, the Reserve was enlarged by a Decree from the Québec Environment Minister (see image A: “Decree”).

In October of 2024, the Association proposed a 9.5 km² strategically-located enlargement for better ecosystems and biodiversity protection within the Reserve (see image B: “Proposal”), under Québec's "30% by 2030" Program for Southern Québec and the Province's Natural Heritage Act.

We provide nature access on the Mary Haydon Trail and the Mont O'Brien Biodiversity Reserve, along with public education on nature and ecosystems. Low-cost family membership and volunteer opportunities on the Reserve are available.

--The Mont O'Brien Association

image A: “Decree”

image B: “Proposal”

• Préserver et protéger le patrimoine naturel de la région du Mont O'Brien en aménageant des sentiers et des aires récréatives sur le site afin de permettre au public d'accéder, d'observer et d'apprécier le site dans le respect de la faune et de la flore;
• Organiser des activités d'interprétation éducatives à l'intention du public sur des sujets tels que l'observation d'oiseaux, la mycologie, la foresterie, etc.;
• Soutenir la protection de la biodiversité et l'environnement de la région du mont O'Brien et de l’Outaouais, conformément aux lois et politiques du Québec et Canada;
• L’Association est une organisation de bienfaisance qui peut recevoir des dons, legs et autres contributions, et peut organiser des campagnes de souscription dans le but de recueillir des fonds pour des fins charitables.

• Preserve and protect the natural heritage of the Mont O’Brien region in managing trails and recreation areas on the site to permit the public to access, to observe and to appreciate the site while respecting wildlife and vegetation;
• Organise educational interpretation activities for the public of subjects such as observation of birds, mycology, forestry, etc.;
• Support the protection of biodiversity and the environment in the Mont O’Brien region, in conformity with the laws and policies of Québec and Canada;
• Receive donations, bequests and other contributions of like nature in cash, stocks and shares or immovable property, manage such donations, bequests and contributions, and organise subscription campaigns for the purpose of collecting funds for charitable purposes.