From Thurston County Public Works:

Free Christmas Tree Curbside and Drop-Off Locations
(Dec. 2014/Jan. 2015)

Curbside pickup information
LeMay compost collection/yard waste customers
Put trees in or near your compost cart (in sections of 3 feet or less).
Call 360-923-0111 for information.

Drop-off locations
Open to all Thurston County residents
Take trees to the Waste and Recovery Center at 2420 Hogum Bay Road NE in Lacey. through Jan. 11. Open Mon. through Fri. from 7 a.m. to 5 p.m. Sat. and Sun. from 8 a.m. to 5 p.m. (closed Jan. 1)

Rainier residents
Take trees to the drop box at 13010 Rainier Acres Road through Jan. 11.
Open Fri., Sat., and Sun. from 9 a.m. to 5 p.m.

Other creative ideas –
– 10 Ways to Recycle Christmas Trees
By Care2, Shelley Stonebrook.
Read more