Grand Lake Colorado Map, . The population was 447 at the 2000 census. Get the most out of Google Maps. Get directions, maps, and traffic for Grand Lake, CO. 1 day ago · Grand Lake, CO Weather Forecast, with current conditions, wind, air quality, and what to expect for the next 3 days. Find camping sites, outdoor recreation, and attractions near Grand Lake, Colorado. It is located in the headwaters of the Colorado River in Grand County, Colorado. Grand Lake is Colorado's largest and deepest natural lake. Grand Lake sits at the southwest entrance to Rocky Mountain National Park. Tribal lands are show in purple and reservation boundaries are shown for the following tribes: Navajo, Hopi, Hualapai, Havasupai, Kaibab Paiute, Shivwits Paiute, Zuni, and Ute Mountain. jxi, phog7, upm, 5tqfe, 6lj1, xy7, effxfhs, tw7s, ynd56, v6nac,