With over 7,500 claims covering 750,000 acres of farm and forestland, Measure 37 claims harbor the potential to change the landscape in Oregon. The majority of these claims are located in the Willamette Valley, where growth pressures and the value gradient between land for farms and land for residential development is great. This paper explores those relationships by describing and mapping the claims in terms of location, size, and current and proposed use, and then analyzes factors that appear to be driving the claims. At a county level, variables such as population growth, farm income, farm tenure and average age of farmer are considered as explanations of claim density. Using maps, we also examine the impact of distance from urban growth boundary and proximity to public lands. We conclude with comments about the unforeseen consequences of the “time zone” zoning on agriculture and public services, and consider the fairness of the Measure 37 regime.