St. Mary’s Glacier is another lovely Colorado hike within an hour drive of Denver. While it used to be more of a hidden, local spot, they’ve added a parking area to make it more accessible. From the parking lot, it’s about 1/2 mile to St. Mary’s lake and another 1/4 mile to the top of the glacier. The pictures below are from August. At that time of year, the glacier had retreated away from the lake a fair amount. However, the lake was still plenty cold. While swimming is not allowed, you can soak your tired feet in the chilly waters.