Harrison Lake Fishing Access Site offers a double-lane concrete boat ramp on Willow Creek Reservoir near Harrison, Montana, with 12 primitive campsites and basic facilities (latrines).

The ramp was improved to 28 feet wide to accommodate two vehicles simultaneously and extended to maintain access during seasonal reservoir drawdown for irrigation.

The site provides year-round access for fishing, boating, and camping, though water levels fluctuate significantly throughout the season.