Pros: Steep, challenging
Cons: Not for intermediates
Mt. Ashland is where I learned to ski and skied most of my life until moving to Montana in 2000. It is a small ski are 10 miles off Interstate 5 at the California/Oregon border. It is known for two things, having the steepest terrain in Oregon and having some of the hardest snow in Oregon. The combination makes for challenging skiing that many people love but recreational skiers tend to loathe.
Mt. Ashland has 4 chair lifts, 23 runs and an open bowl. The bowl has 4 chutes though the first two often merge into one big chute. The mountain claims 50% of the runs are advance but many visitors think that number is low.
The snow quality at Mt. Ashland is comparable to what you find around Tahoe. It does get subjected to thaw/freeze conditions causing it to be icier than most mountains in Oregon. The upside is the snow density and northern exposure makes for fun spring skiing. Powder at Mt. Ashland runs from decent Cascade powder to mash potatoes and is more dependent on where the moisture is coming from than the time of year.
Because of its size I would have a hard time recommending going out of your way to ski Mt. Ashland. On the other hand, if your passing by on I-5 or down seeing plays in Ashland its challenge and scenery (you have great views of Mt. Shasta, Mt. Pitt & the Siskiyous from there) makes it worth your time. East Coast skiers and skiers used to frozen Sierra Cement will find the snow very skiable. Rocky Mountain skiers and Mt. Bachelor skiers probably won't enjoy it.