Canada's national park system owes its genesis to the chance discovery of natural hot springs in the Rocky Mountains near Banff, Alberta, in 1883. This accidental find by Canadian Pacific Railway (CPR) workers quickly drew attention, leading to an influx of visitors seeking the therapeutic qualities of the mineral waters. Recognizing the immense potential for tourism and economic development along its new transcontinental line, the federal government, under Prime Minister Sir John A. Macdonald, moved swiftly. In 1885, a 26-square-kilometre area surrounding the springs was designated as a public reserve, establishing the very first protected land within what would become a vast network of national parks. This initial step was primarily driven by commercial interests and the desire to create a unique destination to attract travellers.

The informal reserve around the Banff hot springs was soon formalized through landmark legislation. The Rocky Mountains Park Act, passed in 1887, officially established Canada's first national park, initially named Rocky Mountains Park. This act enshrined the principle that these lands were to be set aside for the "benefit, advantage and enjoyment of the people of Canada." While still emphasizing recreation and health, the legislation also introduced the concept of preservation, albeit broadly defined, by restricting certain commercial activities and ensuring the natural state of the area. This legal framework provided the blueprint for future park designations, laying the groundwork for a system intended to balance public access with environmental safeguarding.

The vision for Canada's national parks was significantly shaped by influential individuals and prevailing ideologies of the late 19th century. While Prime Minister Sir John A. Macdonald's government made the initial designation, the long-term conceptualization and zealous promotion of a comprehensive park system were largely spearheaded by figures like James Bernard Harkin, who later became the first Commissioner of Dominion Parks. Harkin, often regarded as the "Father of Canada's National Parks," advocated passionately for the expansion of protected areas across the country, emphasizing their role in national identity and conservation. His efforts, coupled with a growing public appreciation for wilderness, were crucial in transforming isolated reserves into a coherent national strategy for natural heritage.

Following the establishment of Rocky Mountains Park (later Banff), the system rapidly expanded. Yoho and Glacier National Parks were created in 1886, even before Banff's formal act, primarily to protect scenic areas along the CPR line and further boost tourism. Jasper National Park followed in 1907. This early expansion demonstrated a continued focus on accessible wilderness for public enjoyment and economic benefit. However, over time, the underlying philosophy evolved. By the early 20th century, a stronger conservation ethic began to emerge, shifting the emphasis from purely recreational and economic exploitation towards the protection of ecological integrity, biodiversity, and wildlife. This broadening mandate reflected a growing understanding of environmental stewardship.

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