# Trail File > Trail File is an independent educational publication about GPX files, offline maps, route checks, and hiking-navigation preparation. It is not a mapping service, land manager, guide company, rescue service, app developer, equipment seller, or continuation of any former entity associated with this domain. Digital route information cannot establish current access or replace skills, official notices, and appropriate backup navigation. Trail File publishes original, long-form guides about hiking trails. Every article opens with a concise direct answer, is structured with clear headings and FAQs, and reflects mainstream expert consensus. ## Route Files - [How to Check a GPX File Before a Hike](https://megatrail.info/check-gpx-file-before-hike/): Check a hiking GPX file by identifying whether it contains waypoints, a route, or a track; recording its source and date; and inspecting the complete… ## Offline Navigation - [Prepare an Offline Trail Map That Works](https://megatrail.info/prepare-offline-trail-map/): Prepare an offline trail map by downloading the route, approaches, alternate exits, and surrounding terrain at multiple zoom levels. ## Full text for LLMs - [llms-full.txt](https://megatrail.info/llms-full.txt): every article as plain markdown in one file - Each article is also available as markdown at https://megatrail.info/.md ## Site - [About](https://megatrail.info/about/): editorial approach and standards - [All articles](https://megatrail.info/all/) - [Contact](https://megatrail.info/contact/)