Yeongnangho Lake
Take a bike ride around Yeongnangho Lake The lake funnels into the East Sea and takes about an hour on bike to get fully around the lake. Some stops along the way include Bombawi, a rock shaped like a crouched tiger which offers views of downtown, pagodas and temples.
Sokcho Beach
Visit Sokcho Beach Only "open" from approximately July 10 - August 20, but still worth a visit when the beach is "closed", but you can still get on the beach.
East Sea / Sea of Japan
See the East Sea / Sea of Japan. The beaches are not the most beautiful in the world but at night you might get to see a lot of Korean groups burning fireworks at the beach. There are numerous pagodas and observation areas for sunsets with fishing ships in the foreground. Also, the Lighthouse Observatory offers a better-than-average view of the East Sea.
Seoraksan National Park
Visit the Seoraksan National Park two hours before sunrise to two hours before sunset, one of the most beautiful national parks in South Korea. Try and visit on a clearer day because if you climb to the peaks there isn't much to see from the top except for clouds when visibility is low. Buses Nr. 7 and Nr. 7-1 get you from Sokcho to the park within 30 minutes. The park has a variety of routes which are well marked and i.e. lead to the Ulsanbawi peak, Biryong Waterfall, Geumganggul Cave, Biseondae, etc. Also, a cable car runs to Gwongeumseong Fortress and takes about 10 minutes to ascend to the top. The view is stunning except for cloudy days when you can't see much. It has stunning nature, beautiful temples, a giant Buddha statue and scenic rivers. The park can be quite crowded at ground level but the higher you get the less people you will see. A variety of food places provide with drinks and meals along all the routes.