Clark Elster is a well known and respected pastel instructor.  His workshops are well attended.  Students travel great distances to attend.  His classes usually fill up well in advance.    The following is a list of a few of the workshops Clark has recently taught:

Walla Walla, WA:   
Vashon Island, WA:
Coupeville, WA:  
Tokeland, WA:  
Yakima, WA:
Paulsbo, WA:
Issaquah, WA:   
Roseburg, OR: 
Clarkston, WA
Mt. Vernon, WA at Dakota Art
Workshops in my studio  in Shoreline, WA just north of Seattle:

Current Workshop list