Ethereum uses Ether. You can buy Ether on many exchanges. There are many Ether wallets to choose from. Ethereum is a decentralized platform that runs smart contracts: applications that run exactly as programmed without any possibility of downtime, censorship, fraud or third party interference.
The Burke-Gilman Sammamish Trail is a rail trail in King County, Washington. The 27-mile (43 km) multi-use recreational trail is part of the King County Regional Trail System and occupies an abandoned Seattle, Lake Shore and Eastern Railway corridor.
Shenandoah National Park has over 500 miles of trails, including 101 miles of the Appalachian Trail. Some trails lead to a waterfall or viewpoint; others penetrate deep into the forest and Wilderness. With such an abundance of trail options you will certainly be able to find something to fit your interest and ability.