Editing Trail (section)

=== Classification ===
[[File:BergAlpinWegweiser.jpg|thumb|Swiss signs: hiking trails in yellow,<br />mountain path in white-red-white,<br />Alpine Route in white-blue-white]]

A simple colored symbol to classify a trail's difficulty in the USA was first used for ski trails and is now being used for hiking, bicycle, other trails.<ref>{{Cite web |url=http://www.skinet.com/ski/transportation-security-administration/2008/11/signs-of-the-times |title=Signs of the Times |last=John Fry |date=November 2008 |publisher=SKI Magazine |access-date=25 August 2011 |archive-url=https://web.archive.org/web/20160323105049/http://www.skinet.com/ski/transportation-security-administration/2008/11/signs-of-the-times |archive-date=23 March 2016 |url-status=usurped }}</ref><ref>{{Cite web |url=http://www.fs.usda.gov/wps/portal/fsinternet/!ut/p/c5/04_SB8K8xLLM9MSSzPy8xBz9CP0os3gDfxMDT8MwRydLA1cj72BTSw8jAwgAykeaxcN4jhYG_h4eYX5hPgYwefy6w0H24dcPNgEHcDTQ9_PIz03VL8iNMMgycVQEAIzTHkw!/dl3/d3/L2dJQSEvUUt3QS9ZQnZ3LzZfMjAwMDAwMDBBODBPSEhWTjJNMDAwMDAwMDA!/?navtype=&cid=stelprdb5103006&navid=110160000000000&pnavid=110000000000000&ss=110618&position=Not%20Yet%20Determined.Html&ttype=detail&pname=Willamette%20National%20Forest-%20Hiking |title=Trails/Hiking: Explanation of Trail Difficulty |publisher=US Forest Service |access-date=25 August 2011 |archive-date=7 November 2012 |archive-url=https://web.archive.org/web/20121107204736/http://www.fs.usda.gov/wps/portal/fsinternet/!ut/p/c5/04_SB8K8xLLM9MSSzPy8xBz9CP0os3gDfxMDT8MwRydLA1cj72BTSw8jAwgAykeaxcN4jhYG_h4eYX5hPgYwefy6w0H24dcPNgEHcDTQ9_PIz03VL8iNMMgycVQEAIzTHkw!/dl3/d3/L2dJQSEvUUt3QS9ZQnZ3LzZfMjAwMDAwMDBBODBPSEhWTjJNMDAwMDAwMDA!/?navtype=&cid=stelprdb5103006&navid=110160000000000&pnavid=110000000000000&ss=110618&position=Not%20Yet%20Determined.Html&ttype=detail&pname=Willamette%20National%20Forest-%20Hiking |url-status=live }}</ref>
*Green circle – easy
*Blue square – moderate
*Black diamond – difficult

Other systems may be used in different locations.<ref>[http://www.trentu.ca/academic/trailstudies/difficult.html Trail Difficulty Classification] {{Webarchive|url=https://web.archive.org/web/20170216193602/http://www.trentu.ca/academic/trailstudies/difficult.html |date=16 February 2017 }}. Trail Studies Unit, [[Trent University]]. Retrieved 25 August 2009.</ref><ref>[http://everything2.com/title/Ski+trail+difficulty+classifications Ski trail difficulty classifications] {{Webarchive|url=https://web.archive.org/web/20170802112959/https://everything2.com/title/Ski+trail+difficulty+classifications |date=2 August 2017 }}. gavmck, [[Everything2]], 4 June 2004. Retrieved 25 August 2009.</ref>

In Switzerland, paths are classified by three levels of difficulties: Hiking paths (yellow markers), mountain paths (white-red-white markers) and alpine paths (white-blue-white markers).