To upload a GPS file, use the Browse button to choose the file, and then click Submit. You may upload up to three files for any one trail. Please submit only *.gpx, *.kml, or *.gdb files, in addition to a spreadsheet or text file with the waypoint descriptions. Other file formats may not be reviewed by RTC staff. Please follow the GPS data standards detailed here. if you have questions about the process please contact us. Thanks for your help!