Hi Chris,

Please also see the current community guidance on closed/unsanctioned trails at https://wiki.openstreetmap.org/wiki/Australian_Tagging_Guidelines/Cycling_and_Foot_Paths#Closed/Illegal_Paths it's usually better to make it as disused and no access then delete it, especially where there is still some evidence of a trail on on the ground.

The point I keep coming back to is someone undertaking research of unsanctioned trails, ideally if they trail exist it should be in the OSM database for those research projects and tagging as disused and access=no would support that.