The lake was constructed primarily as a retention basin to mitigate flooding from the Oelbach stream.
The water body is artificially shaped and lacks natural origins in the local geology.
It is a recognized habitat for several protected species of amphibians and waterfowl.
The reservoir acts as a sediment trap for runoff from the surrounding urbanized catchment area.
Ümminger See is a flood control reservoir in the Langendreer district of Bochum that serves as a local recreation area. The lake covers approximately 11 hectares and was created in the 1970s to manage water levels for the nearby Oelbach stream. It features a circular path measuring roughly 1.5 kilometers, popular for jogging, cycling, and walking. The site is a documented bird sanctuary, hosting migratory water birds throughout the year. Fishing is permitted under specific local regulations for permit holders. The area includes a dedicated playground and areas for recreational sunbathing. While swimming is prohibited due to water quality standards, the park remains a primary green space for the eastern Bochum metropolitan region.
The wooden footbridge and observation points along the western shore offer the clearest views of the water.
Bring binoculars if you are interested in birdwatching, as the reeds are a prime spotting area.
Park near the designated access points on the north side to avoid blocking residential streets.
Combine your walk with a visit to the adjacent Oelbach park area for a longer route.
Do not attempt to swim in the lake, as water quality monitoring is focused on environmental health rather than bathing safety.
Keep dogs on a leash in designated areas to protect nesting bird habitats.
