Treat Jeongdongjin as a dawn destination with a return journey attached. Confirm the first workable arrival and the ride back before choosing where to sleep or setting an alarm.
Build the morning around one beach section
Jeongdongjin Beach is at 17 Jeongdongyeok-gil, beside Jeongdongjin Station; the Korea Tourism Organization lists the beach as open around the clock. Station and beach access are separate from any ticketed attraction or railway area. Stay on public paths and follow signs and staff directions.
Look up the sunrise for the exact date and Jeongdongjin location with the Korea Astronomy and Space Science Institute calculator. It gives an astronomical time, not a clear-sky promise. Check cloud, wind and coastal warnings again before heading out.
Make the return the deciding detail
Search the date-specific train or bus in both directions and count the walk from your accommodation to the public beach. A central Gangneung stay adds a pre-dawn transfer; a nearby room reduces that first leg but narrows the rest of the itinerary. Keep breakfast or a warm indoor stop near the route back, then continue with one later Gangneung plan.
Korea Tourism’s Jeongdongjin Beach listing includes the address and visitor information. Check live rail details through KORAIL.