Douglas Lake Cattle Company charges up to $100.00 a day to fly fish their private lakes (that they maintain by stocking, cleaning, aerating, etc.). There are public lakes that you can access for  free (Douglas Lake is public) or pay an access fee (Salmon Lake).
The Douglas Lake Cattle Company sets a daily rate of up to $100.00 for those who wish to fly fish on their privately owned lakes (which involve tasks such as stocking and maintenance). In contrast, public lakes like Douglas Lake are accessible at no cost, while private lakes like Salmon Lake require an entrance fee.