Spillovers  can  significantly  reduce  or  enhance  the  effects  of  land-use  policies,  yet  there  exists  little rigorous evidence concerning their magnitudes. We examine how national parks within Costa Rica affect the  clearing  of  forest nearby. We findthat  average  deforestation  spillover  impacts  are  not  significant within  0-5km  and  5-10km  rings  around  parks.  However,  we  argue  that  this average  blendsmultiple spillover  effects,  each  of  which  is  likely  to  vary  inmagnitudeacross  the  landscape,  yielding  varied  net effects. We distinguishthese effectsusingdistances to roads and park entrances, given the importance of transport  costs  and,  for  Costa  Rica,  tourism. We  find  large  and  statistically  significant  leakage  close  toroads in areas without tourism,i.e., far from the park entrances. In contrast, no leakage isfound far from roads orclose to park entrances. In sum, the combination of low transport costs and low returns to forest is conducive to deforestationleakage aroundtheparks.