Unfortunately the Annapurna 100 course is difficult for supporters compared to other races for two reasons. Firstly, the race runs away from good roads towards the mountains. Secondly, the 50 km finishes at Sikles, 4 to 5 hours away from Pokhara. The 100 km finishes 1 hour away from Pokhara.
So this is nice for the runners but supporters following runners is a challenge.