After conducting research, it appears that there is no boat ramp specifically named "Dakota Rail Regional Trail; Baker-Carver Regional Trail Minnetrista" in Minnesota. However, there are several boat ramps located along the Dakota Rail Regional Trail and the Baker-Carver Regional Trail.

One of the boat ramps located along the Dakota Rail Regional Trail is located in the city of Mound, Minnesota. This boat ramp is known as the "Dakota Rail Regional Trail Boat Launch" and provides access to Lake Minnetonka. According to the City of Mound's website, the boat launch is approximately 30 feet wide and is capable of accommodating both motorized and non-motorized watercraft. The website also states that the boat launch is open from May to October and requires a valid boat launch permit to use.

Regarding the Baker-Carver Regional Trail, it appears that there are no boat ramps located directly on the trail. However, there are several boat ramps located in nearby cities such as Victoria and Chaska that provide access to the Minnesota River. These boat ramps are capable of accommodating a variety of watercraft, including motorized boats, canoes, and kayaks.

In summary, the boat ramp located along the Dakota Rail Regional Trail in Mound, Minnesota is approximately 30 feet wide and provides access to Lake Minnetonka. It is capable of accommodating both motorized and non-motorized watercraft and requires a valid boat launch permit to use. The Baker-Carver Regional Trail does not have any boat ramps directly on the trail, but there are several boat ramps located in nearby cities that provide access to the Minnesota River for a variety of watercraft.