Glenallen, Missouri is a small town located in Bollinger County with a humid subtropical climate. The summers are hot and humid with average temperatures of 90°F, while winters are usually mild with average temperatures of 32°F. Hydrologically, the town is situated near the Castor River, a tributary of the Mississippi River, which provides an excellent source of water for aquatic species and recreational activities like fishing and canoeing. Glenallen also offers outdoor recreation opportunities such as hiking and camping in the nearby Mingo National Wildlife Refuge, which is home to a wide range of wildlife including bald eagles, river otters, and alligators. Overall, Glenallen is a great destination for nature lovers and outdoor enthusiasts looking for a peaceful getaway.