登山路線搜尋

http://alltrails.com/ (GPS導引付費最佳App，可搜尋Mountain Bike)
https://www.traillink.com/
http://www.nrtdatabase.org/ (National Recreation Trails)

http://www.simpsoncity.com/hiking/
http://www.modernhiker.com/
http://nobodyhikesinla.com/
http://www.hikespeak.com/
http://www.mapmyhike.com/
http://www.lamountains.com/

http://abhiking.blogspot.com/ (Orange County)

跑步

http://www.runmap.net/