When driving to Valdez there is only one way in and out. There are many ways to reach Glennallen, but from that point it's 115 miles south on the Richardson Highway.
From Anchorage it's 118 miles northeast on the Glenn Highway to reach Glennallen. The drive from Anchorage to Valdez averages about 5.5 hours. From Fairbanks it's 363 miles south on the Richardson Highway to reach Valdez. The drive from Fairbanks to Valdez averages about 6.5 hours.
Flights in and out of Valdez can be temperamental, and the planes flying in are smaller and subject to weather. Sequential multiple day cancellations are not infrequent. Cloud cover, fog, blizzards, and high winds are all able to close out flights to and from Valdez. There are no scheduled buses to Valdez to rely on for a backup.
It's a long drive for most people covering the ground between Glennallen and Valdez. You'll always want to make sure you have enough fuel to cover the stretch.
In summer make sure you have plenty of water or fluides. This area can see temps in the 80's and if you're stuck in construction you'll want something to keep you hydrated.
When renting a car or RV consider rental insurance. If anything goes wrong you can leave the troubles with the keys and vehicle when you drop it off. Using your own insurance to cover damages can be a very large headache.
Alaska Fish and Game estimated likely more than 800 moose are hit by vehicles each year in Alaska. Your odds of hitting a moose go up 70% in winter.
The drive from Glennallen is one of the most beautiful stretches of road in North America. As you leave Glennallen towards Valdez there are wonderful views of the Wrangell Mountains to the left for the first few miles. From 108-88 Mile the highway is pretty flat and lined with spruce blocking out any mountain views in the distance.
From 88 Mile heading south you begin to enter the highlights of the drive. 60-46 Mile is heavy with moose, be mindful when driving that area. In winter it is not uncommon for moose to sleep on this part of the highway.