DULUTH, MN (KDAL) - The Duluth Parks and Recreation Department has set up winter break skating sessions this week at the Heritage Sports Center.  The sessions each afternoon from 2 to 4 p-m are free and open to all ages for pleasure skating.  The Bayfront Park skating rink is also open from 1 to 8 p-m through Saturday and from 1 to 5 p-m Sunday.  Chester Bowl is open for skiing from Wednesday through Saturday from 11 a-m to 4:30 p-m and daily lift tickets are $5.25.  Chester Bowl will also feature the Winter Carnival on Saturday.