To find locations close to recreation sites, you must first calculate the Euclidean (straight-line) distance from recreation sites.

Click and drag the Euclidean Distance tool from the Distance toolset onto the ModelBuilder window.

Right-click the Euclidean Distance tool element and click Open. Click the Input raster or feature source data drop-down arrow and click the rec_sites layer. Accept the default path for the value of the Output distance raster parameter, but type “EucD_rsites” for the name. Instead of specifying a set distance from each point to use when calculating the output, you’ll accept the default for the Maximum distance parameter—the edge of the output raster is used as the maximum distance. The cell size is taken from the environment setting you set previously to be the same as your elevation data. In this exercise, the output direction raster is not required. Right-click the Euclidean Distance tool element and click Run to run the process.