Coroners did not like to use the word "accident", Mr Crerar said at the inquest into the death of Phillip Donald McKenzie (20), of Alexandra.
Mr McKenzie died on June 21 after receiving severe brain injuries in the June 19 crash.
The coroner said the collision was "happenstance" unlikely to recur.
He heard evidence the Central Otago District Council banned motorcyclists from the Pines plantation, an area used as a reserve covering 17ha near the northern entrance of the town.
Although signs highlighting the ban were in place at two main access points to the Pines, there were many other access points.
Police and council staff said there had been no complaints for several years about motorcyclists in the Pines.
Police took a "common-sense approach" and thought it was better for trail bikers to travel through the area to access other trail-biking areas, rather than using public roads, Sergeant Ian Kerrisk said.
Mr Crerar said he was swayed by the comments from police and Mr McKenzie's parents, Rod and Diane McKenzie, who asked there be no restrictions on the recreational use of the Pines as a result of the crash.
In a letter read to Mr Crerar, Mr and Mrs McKenzie said it was "just an accident" and they would hate to see the area placed out of bounds to motorcyclists.
"It's a great amenity to Alexandra to have a safe place like that, " they said.
Rod McKenzie said his family lived 50m from the Pines and both his sons learned to ride motorbikes there.
"I would say 99% of riders go in there and ride responsibly."
Bikers, motorcyclists, motorists, walkers and joggers used the area every day and he would hate to see it closed or fenced.
Mr Crerar said both riders were "oblivious" of the other until the collision.
Visibility was limited by the trees and scrub and the riders were unable to hear the other motorcycle because of their helmets and the noise of their own bike.
Nathan Lyon, of Alexandra, gave evidence that he and two friends were riding trail bikes in the area on June 19, entering the Pines from the Dunstan Rd side. He was in the front and rode around a slight left-hand bend, which was screened by trees and scrub.
"It all happened so quick. Next thing, a motorbike was in front of me and we hit. I flew through the air and he flew through the air."
Mr Lyon had no idea anyone was coming towards him and had nowhere to go to avoid the collision.
He was doing about 30kmh.
In response to a question from Mr Crerar, Mr Lyon said he did not see any signs that day banning motorcycling in the area.
A friend of Phillip McKenzie, Kurt Verduyn, said he and Mr McKenzie decided to go for a trail bike ride and went into the Pines, travelling towards Dunstan Rd.
Mr Verduyn broke down several times while giving his evidence as he described the start of their trip.
He was originally in front but missed a bend, and Mr McKenzie had passed him.
Not far from that point, he was heading towards a bend, looked up and saw Mr McKenzie being thrown from his bike.
