Most of the North Cascades is isolated wilderness. There are many opportunities to backpack to the middle of nowhere and experience the true wilderness away from highways and scenic overlooks. There are wolves and grizzlies in this area, so take precautions setting up camp and storing food. And if you see a grizzly, be sure to send me a photo.
The posted speed limits on highway 20 are lower than those on most highways in Washington. But that doesn't stop motorcyclists and other vehicles from driving this road at top speed. It seems to me such a waste to fly through this area and miss the scenery, but to each their own. Slower moving vehicle, which is often those traveling at the speed limit, must use the pullouts along the road to allow others to pass. It is illegal to "tow" 5 or more cars- have 5 or more cars or other vehicles lined up behind you wishing to travel at a faster speed.
Trails are a great way to approach peaks, though you won't always find them in the North Cascades. When you do, they are usually no-nonsense, gaining elevation quickly - a true 'sweater'. Elevation gains of over 1000 feet a mile are not uncommon.
If you are not lucky, then your ordeals are just beginning. Bushwacking up - or down - a canyon here is not for the meak!!
Go up to Cascade Pass during a warm summer afternoon and you will be greeted by the stupendous roar of avalanches coming off the north side of Johannesburg Mountain. Watch, from afar, as the ice and rock tumbles far off the mountain into the vallley below.
Avalanches can occur throughout this vertically oriented range.