Lovely hike! The first part of the trail follows switchbacks through the woods, then it opens up to a magnificent view of the Columbia River Gorge. Most of the trail after that point is out in the open and is surrounded on all sides by slopes just completely packed with blooming flowers: yellow balsam root, purple lupine, red paintbrush, and more! Absolutely breathtaking!
As for nuisances, we did notice that there were quite a few annoying bugs (big gnats?) in the wooded parts of the hike- so it would be wise to pack bug spray. If you keep moving they aren't so bad, but as soon as you stop, a few will land on you. There was also an excessive amount of poison oak growing on the edges of the path until the trail breaks free from the woods, so be careful and wear long pants! Also, there are rattlesnakes living on this mountain, but we didn't see any (although many hikers do).