Relationships between coastal cutthroat trout (Oncorhynchus clarkii clarkii) abundance and whole-watershed measures of landscape characteristics, network structure, valley confinement, and reach architecture were explored for 40 small watersheds (< 8 km) in western Oregon.  The data was collected as part of a larger effort to examine factors influencing the spatial distribution of cutthroat trout within headwater streams. Field collection consisted of contiguous measures of fish abundance and geomorphic unit types. Watershed characterizations included contributing area, eco-region, geology, soil type, average annual temperature and precipitation, mean slope, and hypsometric variation.  Network measures included drainage density, confluence density, and tributary: mainstem size ratios.  Reach measures included estimates of valley constraint, variation in gradient, as well as pool dimensions and longitudinal spacing. Preliminary results show that trout abundance is significantly correlated with the relative amount of scour pools among and within watersheds. The spatial distribution of scour pools varies widely across watersheds, but shows some relationship to measures of valley confinement and network structure.  Further investigation will explore hierarchical linkages between watershed geomorphic structure and the distribution of trout habitat.