Small mammals are important in to the ecology of forests in the Pacific Northwest. Despite their continued research focus, there are many knowledge gaps in regards to the regulation of their population dynamics. In particular, there are few estimates of small mammal vital rates in the Pacific Northwest and the few published examples estimate annual vital rates. However, we hypothesize that seasonality in the forests of the Pacific Northwest should result in vital rate differences between winter and summer seasons. We are using a 10-year live trapping dataset with annual spring and fall trapping occasions to estimate seasonal (6 month) apparent annual survival and recruitment rate.