The name Hongryudong translates literally to Red Stream Valley, referencing the vivid reflection of crimson autumn maple leaves on the water.
The valley contains several stone inscriptions carved by Joseon-era scholars and poets into the bedrock along the stream.
The Sorisil-gil trail, which runs through the valley, was designed as a meditative walking path connecting to the temple grounds.
Geologically, the valley showcases unique erosion patterns caused by the high-velocity movement of water over granite bedrock over millions of years.
Hongryudong Valley is a four-kilometer stretch of gorge located within Gaya National Park, named for its autumn foliage that turns the water appear red. The valley follows the Gasilcheon stream, which originates near Haeinsa Temple. Its geological composition features diverse rock formations carved by stream erosion, including notable boulders inscribed with calligraphy. The valley provides the primary pedestrian path leading toward the UNESCO-listed Haeinsa Temple. The terrain is largely forested with a mix of deciduous and evergreen trees, contributing to its reputation for seasonal color transitions. It is a protected area managed under the jurisdiction of the national park authority.
The wooden pedestrian bridge overlooking the section of the stream where the water channels between massive granite boulders.
Wear footwear with solid grip as the stone paths and riverside rocks can be slippery when wet.
Bring a light windbreaker or layer, as the temperature near the water in the shaded valley is typically lower than in the surrounding lowlands.
Carry out all waste, as there are no trash receptacles provided along the nature trails.
Do not attempt to swim in the valley, as water activities are strictly prohibited in this protected national park zone.
Remain on designated paths to protect local flora; keep noise levels low to maintain the meditative environment.
