The 'SOOS' name is derived from the Egerland dialect, referring to a marshy or swampy area.
Mofettes found here represent the final stage of volcanic activity in the region.
The mineral water in the area is highly acidic and has been documented to contain high levels of iron and carbon dioxide.
The reserve serves as a habitat for rare salt-loving plants, known as halophytes, rarely found inland.
The depth of the peat layers in the basin can reach up to seven meters in some sections.
Excavations in the region have revealed fossils of prehistoric mammals, including remains of extinct rhinoceros species.
The boardwalk system was constructed specifically to prevent human foot traffic from compacting the sensitive bog soil.
Several mineral springs, including the Císařský pramen (Imperial Spring), emerge within the boundaries of the nature reserve.
Národní přírodní rezervace SOOS is a unique geological site located near Cheb, characterized by its post-volcanic landscape of peat bogs and mineral springs. The area features 'mofettes,' which are carbon dioxide gas vents that release gas through fissures in the ground. A marked nature trail leads visitors across a wooden boardwalk over protected wetlands and salt-tolerant vegetation. The terrain is a remnant of a former lake basin that transformed into peat bogs over thousands of years. The reserve sits at an elevation of approximately 440 meters and covers roughly 221 hectares. It functions as a protected national nature reserve due to its rare biological and geological formations. Visitors can observe bubbling mud volcanoes and mineral-rich iron-colored streams. The site is actively maintained to preserve the fragile soil and specific marshland ecosystems.
The boardwalk section overlooking the 'mud pots' and bubbling springs for the most distinctive geological formations.
Wear waterproof, sturdy footwear, as the boardwalk can be slippery and mud may overflow in wetter weather.
Bring binoculars for birdwatching, as the wetlands attract various migratory species.
Plan for extra time at the entrance museum, which houses exhibits on the local paleontology and geological history.
Do not wander off the marked nature trail, as the soil can be dangerously soft and the ecosystem is legally protected from disturbance.
Open seasonally from spring through autumn; closed during winter months due to ice and ground conditions.
Strictly remain on the designated boardwalks to protect the fragile bog crust; do not touch or attempt to measure the mofettes.
