Wonsusan & Jeonwolsan Trails
Two low urban mountains in central Sejong linked by a trail network that ranges from a newly engineered 5.4-kilometre accessible loop to short summit climbs and river-city viewpoints
Low-gradient forest walking, short summit hikes, city and river views, linking neighborhood parks with mountain paths, and combining an easy Wonsusan circuit with a steeper Jeonwolsan outing
A two-mountain trail network rather than one continuous route, with four main entrances around Wonsusan, decked low-gradient sections, summit spurs, and separate Jeonwolsan paths rising above the Geumgang–Miho river landscape
The pair is a useful portrait of how Sejong folds existing hills into everyday public space: Wonsusan emphasizes low-gradient circulation, while Jeonwolsan still rewards a more conventional climb
Character
Wonsusan and Jeonwolsan rise inside Sejong’s planned-city fabric, but their trail systems now offer two different kinds of walking: a new 5.4-kilometre low-gradient circuit around Wonsusan and a shorter, more conventional climb toward Jeonwolsan’s 260-metre summit
Wonsusan’s newest loop runs around the mountain on a decked path kept at gradients of 8 percent or less. Four entrance areas connect it to nearby neighborhoods, while junctions with older paths still provide access toward the 251-metre summit. The result is a mountain that can function as an everyday circuit without requiring a summit climb
Jeonwolsan is smaller in scale but more recognizably a hill hike. Its established paths rise toward a 260-metre summit and viewpoints over the Geumgang, the Miho stream confluence and Sejong’s civic core. The two hills can be linked, yet they remain distinct enough to work as separate outings
The experience
On Wonsusan, the newer loop holds a relatively consistent grade while moving through the wooded edge of the mountain. Deck sections negotiate terrain that would otherwise be much steeper, and rest areas appear along the circuit. A commonly used entrance sits near Sejong BMX Stadium, where the walking system also meets the city’s cycling infrastructure
Older summit paths branch away from the gentler circuit, so the mountain can be experienced at two levels: the perimeter loop for sustained low-gradient walking and the interior paths for a short climb. The separation between pedestrian and MTB routes is part of the newer design rather than an improvised sharing arrangement
Jeonwolsan shifts the balance toward elevation and viewpoints. Its Nuri-gil system links the summit with rocks, springs and lookout points on a route that is physically shorter but more like a conventional mountain path. From the upper slopes, the planned city and its river corridors become part of the view
History
Wonsusan and Jeonwolsan were already being used as a connected hiking landscape during Sejong’s early years as a new administrative city. A 2017 Sejong Facilities Corporation route treated the two hills as one roughly four-hour outing, climbing Wonsusan at 251 metres before continuing to Jeonwolsan at 260 metres
Jeonwolsan’s public trail infrastructure expanded in the 2010s, including viewpoint and safety facilities. Wonsusan’s largest change came later. A new circular trail project ran from 2018 into 2025, adding a 5.4-kilometre loop around the mountain and four neighborhood-facing entrances
The original Wonsusan design included gradients reaching 16 percent. During development, the route was revised through coordination among public agencies, the city and residents so that the full circuit stayed at 8 percent or below. It opened in January 2025, turning accessibility into a physical property of the route rather than an add-on at a single entrance
Before you go
The two mountains cover different amounts of ground even though their summits are similarly low. Wonsusan’s circular trail is the more predictable continuous walk; Jeonwolsan adds steeper path conditions and a stronger summit-and-viewpoint emphasis. Combining both creates a substantially longer mountain outing than either one alone
- Access
- Wonsusan’s 5.4-kilometre loop has four main entrances; an approach near Sejong BMX Stadium provides direct access to the low-gradient circuit and connections toward summit paths