This gets into technique as much as procedure since this is not a course reversal hold.
But doesn't this miss the point a bit? Pilots aren't supposed to have to consider where protected airspace is in deciding which way to turn (granted, it's a useful thing to know about to stay alive, but the system doesn't require it). There are supposed to be only two methods of assuring terrain clearance under IFR. Either:
A) I'm radar identified and either on a vector or on a direct clearance where ATC is assuring the terrain clearance
or
B) I'm following a procedure that has been
designed to be safe.
I find it hard to believe that having missed an approach, the
only way out of the TGO hold is by radar vectors or an ATC-assured direct. In that case either:
1) It's up to the procedure designer to check that I can make a left turn from TGO with adequate terrain clearance
or
2) It's not up to the procedure designer to check that I can make a left turn from TGO, and the "procedure"
requires me to make a right turn of the sort that you describe.
If the procedure requires a right turn, I'd like to see where in PANS-OPS that's described (I'm not challenging you, aterpster). If the procedure allows me to make a left turn, surely the appropriate "technique" is to make a left turn, because it's shorter -- I don't normally make 270 degree turns just for fun.
In this particular case, the MVA in the area of a left turn is only 3500 ft, so it
is a terrain-safe manoeuvre. But I don't know if it would be in general.