Visitors have five new trails at Dos Rios Ranch State Park, nearly a year after it opened southwest of Modesto. The public can enjoy them starting at 7 a.m. Friday, June 6. They go farther out on the Tuolumne and San Joaquin rivers than the initial two trails. They also provide easy access for the first time to swimming and fishing spots. … Dos Rios was created on about 1,600 acres of one-time floodplain where the two rivers join. Restoration began in 2012, led by River Partners and aided by the Tuolumne River Trust. The nonprofits had more than $40 million from numerous public agencies. Former farm fields gave way to native trees, brush and grasses. Fast-growing cottonwoods, willows and other plantings shelter and feed wildlife. The place was designed to absorb high river flows, protecting Grayson and other towns downstream.