As sudden oak death continues to ravage Sonoma County woodlands, a secluded creek near Glen Ellen bears the impact of a malady that experts say is likely unstoppable and has just begun its onslaught.

Healdsburg is the second city in Sonoma County to have an official tree, joining Santa Rosa, whose official tree is the Santa Rosa plum. The Esposti Tree, a coast live oak, is the symbol of Windsor, ...