A blue off-road vehicle drives down a dirt road in a grassy valley with mountains in the distance in Grand County Colorado.

Summer in Grand County

Summer in Grand County is peak adventure season. This mountain playground offers long days filled with summer activities Colorado is known for — lake outings, scenic hikes, bike rides, and plenty of time on the water. Whether you’re casting a line, paddling across Lake Granby, or cooling off at one of the county’s smaller alpine lakes, lake life is part of the daily rhythm. Trails wind through wildflower meadows and ridgelines, making summer hiking in Grand Lake a highlight for all levels. The cool mountain air sets the stage for vibrant Colorado events — festivals, concerts, and community gatherings that fill the calendar from June through August.