The 22nd Annual Salmonid Restoration Conference, "Collaborative Watershed Efforts for Salmonid Recovery," will be held in Davis, Calif., March 17-20. Workshops, field tours and technical sessions will focus on topics affecting recovery efforts for salmon and steelhead and associated ecosystems locally, regionally, and globally. www.calsalmon.org 707-223-1770

The Society of Petroleum Engineers International Conference on Health, Safety, and Environment in Oil and Gas Exploration and Production will be held in Calgary, Alberta, Canada, from March 29-31. http://www.spe.org 972-952-9321, Jennifer Patitz

From March 31 to April 4, the Aldo Leopold Foundation and La Ruta de Sonora will host a tour of the Lower Colorado River Basin and Delta. www.laruta.org 608-355-0279