From the Associated Press via The Durango Herald:
In Southwest Colorado, all boats launched from trailers will be inspected at the following reservoirs: Vallecito Reservoir in La Plata County; Navajo Reservoir in Archuleta County; McPhee Reservoir and Jackson Gulch Reservoir at Mancos State Par in Montezuma County; Taylor Reservoir and Blue Mesa Reservoir in Gunnison County and Sanchez Reservoir in Costilla County. Sanchez Reservoir also is closed from 8 p.m. to 6 a.m. Boats can be launched only at the boat ramp. The reservoir will be closed to boating completely for the winter starting in October. Boats must be inspected every time they enter the water. Depending on the reservoir, inspections will be conducted by personnel from the Colorado Division of Wildlife, Colorado State Parks or the National Park Service. The DOW has coordinated inspection training with the other agencies…
Inspection times vary from reservoir to reservoir but generally inspectors will be at boat ramps from 6 a.m. to 8 p.m. every day until October. For a list of all the mandatory inspection sites and schedules in Colorado, or for more information aquatic nuisance species and the boat inspection program, visit http://wildlife.state.co.us/Fishing/MandatoryBoatInspections.htm.