This road description changes from year to year, even from Spring to Fall. Road washouts are not uncommon early in the year, but not every year. You can call the Rangers at Glacier, but I have found them indifferent or misinformed as to current conditions. I just hiked (8/22/12)the road between Yellow Aster Butte/Lake Tomyhoi trailhead and Twin Lakes because the Ranger said that only "high prfile vehicles could make it". Nothing could have been further from the truth. Car after car drove by and it was easy going. I think posting a question on summitpost or NWhikers would get better current info than the Rangers. I will say the walk was rewarded with an abundant display of so many flowers, so what the heck?
Elevation Gain 2,900 (from yellow aster butte trailhead)
High Point 6,521
The trail is short if measured from the Twin Lakes, about 2.5 miles, and not too steep, it gains about 1,300 feet. But that is only the trail. However, if the road approaching Twin Lakes is not passable, you have to add the following variable : you must hike a relatively easy 2.2 miles up the road gaining 1600 feet in the process. This makes for total of 4.7 miles and 2,900 feet gain, perhaps hard for some people to hike but very easy for a climber. This is truly one of the most spectacular hikes in the region. The trail begins at Twin Lakes. The sign showing where to begin is between the two lakes, where there are also very nice campsites then heads due west . After a sharp turn that points you back north you start to gain some elevation before entering a little a quarter mile traverse to the south with absolutely stunning views of baker and Shuksan. There is one fork in the trail, left (south) to the Lookout and right to High Pass and Mt. Larrabee. There was a signpost on 8/22/12 showing the choice and direction. The trail wanders through open slopes with many flowers to enjoy and the views just keep getting better if the weather allows.
Essential GearIn winter and early spring an Ice Axe is recommended.
In winter you'll need skis or snowshoes and avalanche gear.