Use the stone-wall path, the riverside zelkova and summer lotus fields cited by Yangpyeong tourism to shape a short walk. Once you reach the tree, decide whether the group has time and energy for another stop.
Yangpyeong tourism: Dumulmeori · VisitKorea directions from Yangsu Station · Semiwon Garden visitor information
Make the river walk the fixed part
From Yangsu Station Exit 1, VisitKorea lists buses 8-4, 8-5, 8-7, 8-8, 8-55 and 88-6 to Yangsu-ri Dumulmeori, followed by about a 20-minute walk; a taxi takes about 10 minutes. Check the current bus timetable before leaving. At the riverside, follow the path towards the old zelkova and turn back or continue along the stone-wall section. Lotus flowers are seasonal; mist and sunrise depend on the day.
Extend only if the return still fits
For a half-day, finish after the riverside walk and leave time for food and the return trip. A full day can add Semiwon Garden after checking its opening status and the transfer. Confirm the return bus or parking plan before setting out; shorten the walk if weather, crowds or the path surface make it uncomfortable.