Latest report from St Helens includes this:
The Monitor Ridge Climbing Route is the shortest and most direct route to the summit of Mount St. Helens. Follow the Ptarmigan Trail No. 216A to Timberline. Blue diamonds on trees will guide climbers through the forested trail. Above timberline, Monitor Ridge climbs steeply through blocky lava flows, loose pumice, and ash. Wooden route marking posts will help guide climbers to approximately 7,200 feet. Snow may cover portions of the route well into the summer.
Full report can be found here.