Assuming you are coming from the East, I would either go to Three Forks and take HWY 287 North toward Helena. HWY 12 joins 287 in Townsend. Follow HWY 287 to 89 to Browning. This is mostly 2 lane road and much of it runs along the Rocky Mountain Front out in farm country. Not much traffic on this route once you get North of Wolf Creek. I live in Helena and have driven to Glacier this many times pulling my 35' 5er. You could also go to Missoula and take 93 North. Mostly 4 lane although on HWY 93 there are stretch's of two lane. More traffic on this route but good road. You could also exit I90 at HWY 200 just before Missoula and go over to HWY 83 up through Seeley Lake. This is a beautiful drive but is long strech of two lane that can see heavy traffic in the summer. If you are planning on going to the East side of Glacier, take my first option for sure. If you are going to the West side, you take any of the three.
