Flat Horn Lake Public Water Access Site offers a carry-in access point suitable for small boats and canoes at a US Forest Service picnic area and swimming beach located at the end of USFS Road 182, approximately 5. 5 miles northwest of Isabella.

The 52-acre lake features brown, bog-stained water and is surrounded by scenic hiking and cross-country ski trails (1. 8 miles) that circle the lake, making it ideal for paddlers and outdoor enthusiasts seeking a quieter recreational experience.