Therefore, avalanche hazard is a concern. Some high country trails may be covered in 10-30 feet of snow. Clothing and equipment should be investigated and tested before the trip. Snowshoes or skies may be necessary for mountain travel until June when snow firms up enough to be walked on. Snow travel in spring and early summer is best done before noon.
Some areas are too dangerous for even the most experienced winter traveler.
If you plan to be traveling in any area of the park during the winter, spring or summer, please read Avalanche hazards . The notoriously high precipitation swells rivers and creeks to many times their normal size until even the smallest creek crossing can become difficult or dangerous to cross. Footbridges often wash out. Standing water in trails can be knee deep for long stretches. They can drop lower but are even more cumbersome in the given range because precipitation is still cold rain and not snow.