Emerald Lake, Yoho National Park, Canada. Emerald Lake is the largest of Yoho's 61 lakes and ponds, as well as one of the park's premier tourist attractions. Emerald Lake Lodge, a high-end lodge perched on the edge of the lake, provides local accommodation. A 3.2 mile hiking trail circuits the lake, the first half of which is accessible to wheelchairs and strollers. During the summer months, canoe rentals are available; in the winter, the lake is a popular cross country skiing destination.