There could be drifts across the road that make it completely impassable until cleared. Its closed for a reason.
A race is not an emergency and I think the advisories are if its not essential do not travel.
Just think while you are being rescued for being a complete tool and thinking that “road closed” does not apply to you someone else, you mum, brother, sister, could really be in need of those emergency services but they were dealing with some tit who thought he knew better
Edit Looked to see who OP was and really suprised it was you molgrips? Sorry I suggested your a tit but its a tit thing to do for a race!