Automated methods for separating baseflow in watersheds are commonly used, but they may not work well for areas dominated by snowmelt. Three popular methods can give different results due to sensitivity to certain parameters during the snowmelt period. A new filtering procedure was developed to exclude the snowmelt period when calibration is not possible, improving the accuracy of baseflow estimates. This method was tested on data from four snowmelt-dominated watersheds in Wyoming and showed reduced sensitivity compared to traditional methods, making it more reliable for estimating low flows in the summer.