BELLINGHAM – Cascadia Mushrooms will be the site of a Tilth Producers Farm Walk on Monday, May 13. Farm owner/operator Alex Winstead of Cascadia Mushrooms will show the public the operation he designed and built from scratch in 2009. Located just north of Bellingham, it operates entirely on alternative power, and 90 percent of its byproducts are recycled. A variety of culinary and medicinal fungi are grown on site. The tour will be held from12:30 to 4 p.m., and an informal bag lunch starts at 11:45 a.m. Pre-registration encourage. For more information, visit tilthproducers.org.