The Americas, Trails

Those websites have several tracks from The Americas.
Check the icons to find out what kind of tracks they have. Most of them also offer to download the tracks as .gpx

Hiking

MTB

Climbing

Riding

Biking

Kayaking

Winter Sports

Offroad

GPS Tour

Database with more than 17,000 tracks.

singletracks

Database with more than 2,500 MTB Trails (focus on the US and Canada).

trailpeak

Nice big Database with more than 10,000 Tracks with a focus on Northamerica

GPS-Tracks

Database with more than 5,000 tracks

Walking away

Small German website with long distance hiking trails and some smaller hiking trails. -with gpx tracks.

GPSies

Biggest database (we know of) with more than 90,000 tracks of more than 100 countries.

wikiloc

Nice database with more than 50,000 Tracks from all over the world

EveryTrail

Database with more than 50,000 tracks from basically everywhere.

Bikemap

More than 80.000 biketracks from almost everywhere. Nice mapsearch!

Wandermap

Nice mapbased database with more than 2000 hikingtrips