- There are thousands of trails to choose from in Washington, and WTA’s Hike Finder Map is one way to explore what’s out there. With it, you can see trailheads dotted all over the state, including those near you.
- Sphere (Wikipedia)
A sphere (from Greek σφαῖρα, sphaîra) is a geometrical object that is a three-dimensional analogue to a two-dimensional circle. Formally, a sphere is the set of points that are all at the same distance r from a given point in three-dimensional space. That given point is the center of the sphere, and r is the sphere’s radius. The earliest known mentions of spheres appear in the work of the ancient Greek mathematicians.