Atmospheric reactive nitrogen deposition plays a key role in nutrient cycling in montane and alpine ecosystems. Anthropogenic sources of nitrogen deposition can have adverse and poorly constrained effects. Current models that predict atmospheric nitrogen deposition in Colorado are based on high elevation, alpine monitoring sites. We hypothesize that rates of reactive nitrogen deposition in the foothills ecozone are higher than models suggest due to proximity to the urbanized Denver/Boulder area. In collaboration with the Network for Urban Atmospheric Nitrogen Chemistry and the National Atmospheric Deposition Program, this study seeks to bridge the gap between urban and alpine monitoring by studying wet plus dry nitrogen deposition in the montane and foothill regions near Boulder, Colorado. Low-cost ion-exchange resin columns were deployed for multiple two-month collection periods across an elevational transect starting in the urban center of Boulder and extending up to the University of Colorado’s Mountain Research Station at approximately 9,500 feet elevation. Preliminary results indicate that ammonium and nitrate concentrations are greater than previously measured in the foothills region and that dry deposition contributes as much as twice the amount of reactive nitrogen than wet deposition alone. Our data also find that atmospheric nitrogen deposition rates for the foothills are underestimated by current models. We need this type of study to understand the spatial extent of the urban signal of reactive N deposition.