Korea Route 77: Driving the Complete West Coast Highway

Most drivers in Korea take the expressway. Route 77 is the opposite: a slower, coastal national highway that follows the western shore through tidal flats, sandy beaches, sea causeways, and cliffside roads. It runs roughly 689 km from the Gyeonggi coast near Incheon south to Mokpo (목포) at the tip of Jeollanam-do. You can drive it end-to-end in three days, or treat individual sections as standalone day trips.

This guide covers the full route from north to south: the best stops in each section, how long to budget, where the road gets genuinely scenic, and the practical details — tolls, rest stops, and navigation. Route 77 doesn't show up by name on most map apps, so knowing the waypoints in advance makes a big difference.

What Is Route 77?

Route 77 (국도 77호선) is a designated national highway that runs along Korea's western coast. Unlike expressways, it passes through towns and coastal villages rather than bypassing them. Many sections run within sight — sometimes within meters — of the Yellow Sea. The road officially starts near Gimpo (김포) in Gyeonggi-do and ends at Haenam (해남) in Jeollanam-do, with the port city of Mokpo as the practical southern gateway.

What makes this route special for foreign drivers is the sheer variety of coastline it covers: the industrial tidal flats near Incheon, the sandy beaches of Taean (태안), the causeways crossing the Geum River estuary, the archipelago bridges near Gunsan (군산), and the sunset cliffs of Yeonggwang (영광). No single section looks like another.

North Section: Incheon to Taean (approx. 170 km)

The northern leg starts near Incheon International Airport on Yeongjong Island — convenient if you're picking up a rental car straight from the airport. Head southwest on the coastal road toward Gimpo and Hwaseong, then continue down through Dangjin (당진) to the Taean Peninsula (태안반도). This section takes 3–4 hours with stops.

Taean Haean National Park (태안해안국립공원) is the northern highlight. The park protects 130 km of coast including Mallipo Beach (만리포해수욕장) and Mongsando (몽산포) — both wide sandy beaches popular in summer but calm enough on weekdays in June and September. The coastal trail (해변길) has viewpoints that let you look back over the tidal sand bars at low tide.

• Mallipo Beach (만리포해수욕장): One of Korea's longest white sand beaches. Free parking, beachside food stalls in summer.
• Kkotji Beach (꽃지해수욕장): Famous for two rocks (Hamel Rock) that frame the sunset. Arrive 30 min before sunset.
• Taean → Boryeong detour: Head east briefly on Route 96 to join the coastal road south — avoids a stretch of inland road.
• Fuel tip: Fill up in Taean town — the coastal road has few stations for the next 50 km.

Central Section: Boryeong to Gunsan (approx. 160 km)

South of Taean, Route 77 passes through Boryeong (보령) — home of the famous mud festival in July — and along the Seocheon (서천) coast before crossing the Geum River estuary. This crossing is one of the road's standout moments: a long causeway bridge with mudflats stretching to the horizon on both sides.

After crossing into North Jeolla Province (전라북도), the route hugs the coast toward Gunsan (군산) and the Gogunsan Archipelago (고군산군도). A series of bridges connects 16 islands in this offshore chain — you can drive from the mainland out to Seonyu Island (선유도) across four causeways. The views from the bridges are among the best on the entire route.

• Boryeong Mud Flat Viewpoint (대천해수욕장): Wide beach, easy parking, mud-themed cafe strip. Good rest stop.
• Geum River Estuary Causeway: Crossing from Seocheon into Gunsan — budget 20 min to stop at the midpoint rest area for photos.
• Gogunsan Bridge Complex: Drive out to Seonyu Island on the archipelago bridges. Round-trip adds about 40 km and 1 hour but is absolutely worth it.
• Gunsan Old Town: Quick detour to see Japanese colonial-era architecture. Park near Jinpo Marine Museum.

South Section: Byeonsan to Yeonggwang and Mokpo (approx. 200 km)

The southern leg is the most rewarding for scenery. From Buan (부안), Route 77 skirts the Byeonsan Peninsula (변산반도) before heading into Gochang (고창) and then southeast into Yeonggwang (영광). Here you'll find Baeksu Coastal Road (백수해안도로) — one of Korea's official 100 Must-See Scenic Roads. The 16 km road clings to low sea cliffs with the Yellow Sea directly below. Sunset here is extraordinary.

From Yeonggwang, continue south through Muan (무안) and Hampyeong (함평) to reach Mokpo (목포) — the natural end of the route. Mokpo sits at the southwestern tip of the Korean peninsula, surrounded by offshore islands. The city's seafood restaurants cluster around Hangdong Seafood Street (항동 수산시장 거리) — a good place to end a coast-to-coast drive with a proper meal.

• Byeonsan Peninsula: Detour to Chaeseokgang Cliffs (채석강) — layered rock formations best seen at low tide.
• Baeksu Coastal Road (백수해안도로): Set Kakao Maps to '백수해안도로 전망대' for the main viewpoint. Narrow in places — drive slowly.
• Mokpo arrival: Use Mokpo IC off the Honam Expressway (25) for return. Mokpo → Seoul is about 4 hours by expressway.
• Overnight option: Yeonggwang has good guesthouses (모텔) if splitting the south section across two days.

Practical Tips for Driving Route 77

Route 77 isn't signed with its number the way Korean expressways are. You'll navigate by town names and specific road names on Kakao Maps or Naver Maps. Set waypoints for each major destination rather than trying to follow the highway number. The road surface is good throughout — some sections near Taean are freshly repaved.

1. 1Navigation: Use Kakao Maps in Korean (가다/경유 mode) for the most accurate routing on coastal roads. Search by 주소 (address) or landmark names.
2. 2Best season: May–June (pre-monsoon) and September–October (post-monsoon) for clear skies and moderate temperatures. July–August is hot but beaches are lively.
3. 3Tolls: Route 77 is a national road — no tolls. You'll pay tolls on expressways getting to/from the route (typically 4,000–12,000 KRW per leg).
4. 4Fuel stops: Don't rely on the coastal road for fuel. Fill up in the larger towns: Taean, Boryeong, Gunsan, Yeonggwang, Mokpo.
5. 5Tidal timing: Several viewpoints (Kkotji, Chaeseokgang) are best at low tide. Check 물때표 (tide tables) or download the Badanamu app.

FAQ

Route 77 rewards slow driving. The best moments — a sunset over Kkotji's twin rocks, the spray at Chaeseokgang, the silence on Baeksu's clifftop road — only happen if you stop the car and get out. Rent something comfortable, leave Seoul early, and let the western coast unfold at its own pace.