Breathe California. Labor Day Weekend, Sept. 5, 6 and 7, will be the 28th annual Emigrant Trails Bike Trek. Cyclists and volunteers will camp at Camp Richardson Resort at South Lake Tahoe. The ETBT features carefully mapped, clearly marked routes with on-road support and varying degrees of difficulty. Breakfast, lunch and dinner are provided each day, along with snacking at the in-camp Cantina. Register at visit www.sacbreathe.org before Aug. 22.