going to the sun road

Copied from the Glacier National Park website:

Are there vehicle size restrictions on the Going-to-the-Sun Road?
Yes. To help reduce congestion, vehicle size restrictions are in effect. Vehicles, and vehicle combinations, longer than 21 feet(including bumpers) or wider than 8 feet (including mirrors), are prohibited between Avalanche Campground and the Rising Sun picnic area parking. Vehicle and vehicle combinations over 10 feet in height may have difficulty driving west from Logan Pass to the Loop, due to rock overhangs. Stock trucks and trailers are able to access Packers Roost on the west, and Siyeh Bend on the east.

There are no campgrounds beyond the St. Mary area on the east side of the Going to the Sun road. Avalanche Campground is the furthest in on the west side.

If you ever saw the road you wouldn't even consider driving it in any vehicle! Westbound is OK since you are on the mountain side of the road but eastbound!!!

You can take route 89 to route 2 from the east to the west. It is 85 miles, about 35 miles longer, but it takes the same amount of time as taking going to the sun road.

Let there be no conflict in your information. The answer is NO. Do not attempt the length of that road from St. Mary's to West Glacier. I have been up and back down it from West Glacier to the pass at the peak in a Jeep Liberty, a smallish SUV, and would not want to have taken any larger vehicle on that journey. I do not know about the other side, but given the nature of the road I was on and the traffic on that road, you will not like the journey in a 25 foot RV, even if they let you make the attempt. Go around and take the bus. Trust us on this one.

To echo the other comments NO you do not want to take a 25' rv on Going to the Sun. Hwy 2 is scenic and takes you around the park. You can see all the campgrounds Here

There are two campgrounds ON the Sun Road near the east entrance. St Mary is one and Rising Sun is the other. There are several OTHER campgrounds on the east side of the park but NOT on the Sun Road. These include "Many Glacier" and "Two Dog" campgrounds. Many Glacier is about 30 miles NORTH of the east entrance and Two Dow is South of the east entrance and accessed from the town of East Glacier. You WILL not want to drive your RV across the pass on the Sun Road EVEN if they didn't catch you trying it :) Standard pick up trucks cannot pass in many areas with tow mirrors extended. Fortunately (due to a lot of stupidity) it IS possible to pass someone with THEIR mirrors extended as long as yours are not.

www.nps.gov/glac

All your questions answered here from the official source

Thank you everyone for your input!

Stay on the west side at Apgar campground and the shuttle bus stops right there. Not sure of the campgrounds on the east and the shuttle. The shuttle is FREE and you can get on and off whenever you want and where you want. What a deal!

Here's the national park website which will give you all the information you'd want to know about the park:

Glacier Nat'l Park

(The above link given in another post is not the 'official' national park website.) :)

Leave the rig in the cg. Ride the red cars through the park. You will be glad you did.