Also known as: Naerincheon Stream, Naerin Stream
Forested Naerincheon valley, clear water, among the cleaner streams in Korea (est)

Whether there is a river here on your dates, and what kind of water it is.
Snowmelt and rain fed; summer monsoon (Jangma) raises flows
April-October
April-October; May (fresh green), October (autumn foliage)
Cold mountain water in spring and autumn; wetsuits provided by operators (est)
Summer monsoon roughly Jun-Aug with flooding; high-water suspensions. Confirm.
A river changes grade with its level. These grades describe a normal flow - in flood the same run is harder, and often a different run entirely. Check the gauge before you commit.
Class II-III
Rafting (paddle raft, 6-8 person)
Hourly departures 09:30-18:00; 6-8 person rafts
Beginner to intermediate; families and groups; ~90 min drive from Seoul
Narrow width, pointed rocks and 10+ rapid sub-streams
Rocky rapids and boulders; no major portage
Wondaegyo to Gosari
Popular in summer; one of Korea top three rafting rivers, busy on weekends
About 35,000 KRW per person independent; ~60 USD organized incl transport and lunch. Confirm.
Permits and operators change - confirm before booking.
X-Game Resort / Hapgang-ri put-in area; roadside operators along the valley road
Operator shuttle return; ~90 min drive from Seoul
Resorts and pensions in Inje; no on-river camping
Raft, paddle, helmet, PFD and wetsuit provided; warm-water showers at base
Inje, Hapgang-ri, X-Game Resort
Cold water, monsoon floods, rocks
Riverside road parallels much of the run; guide-led rescue
Licensed operators with certified guides (Ministry of Culture, Sports and Tourism)
This profile is desk research, compiled from public sources - not a first-hand river run report. Coordinates are approximate.