Stretch out those legs and lace up the sneakers. You have one year to get ready for the first-ever Jersey City Marathon in April 2023. The April 23 race will be the first marathon in Hudson County since the 1988 New Jersey Waterfront Marathon that started in Jersey City and made its way through municipalities in North Hudson. The race served as the United States Olympic trials. Jersey City Road Runners Executive Director Steve Lipski said he expects thousands of people to participate in the marathon and half marathon that are scheduled that day. He says runners will get a view of the Jersey Ci…