Facebook Gruppen: https://www.facebook.com/groups/PreO.DK/
IOFs side om trailorienteering: http://orienteering.org/trail-orienteering/ Kig i menuen øverst til højre, for bl.a. regler mm.
IOF eventor: tilmeldingssystem https://eventor.orienteering.org/Events
World Trailorienteering Championships 2020 i Hong Kong : http://www.wtoc2020.hk/
European Trailorienteering Championships 2020 i Finland:https://etoc2020.com/
Et link til EuropaCuppen ECTO:
https://orienteering.sport/trailo/european-cup-in-trailo/
Svensk præcisionsorientering http://www.svenskorientering.se/Grenar/Precisionsorientering
Svensk eventor, tilmelding til konkurrencer i Sverige https://eventor.orientering.se/Events vælg gren: precisionsorientering
Norsk eventor, tilmelding til konkurrencer i Norge https://eventor.orientering.no/Events vælg gren: precisionsorientering
Parasport Danmark : https://parasport.dk/idraetter/praecisionsorientering/