The article reports the results of a study of the mycobiota in a Petrozavodsk city green space within and around the Kourgan sports facility. The recreational mid-boreal spruce forest was found to harbor 152 species of 104 genera of agaricoid, aphyllophoroid, and gasteroid fungi. The species Postia ptychogaster is reported for the first time for Karelia. Information about the habitats, substrates, and occurrence of the fungal species is provided. The findings of some species are verified by herbarium specimens stored in the Herbarium of the Karelian Research Centre RAS (PTZ) and the Mycological Herbarium of the Komarov Botanical Institute RAS (LE). Pure cultures were obtained for 12 species of basidial fungi. They were deposited to the Basidiomycete Culture Collection of the Komarov Botanical Institute RAS (LE-BIN). Most of the species occurred on fallen and standing dead trunks and on stumps (92 species), including 54 species on coniferous trees and 42 species on deciduous trees. Spruce hosted 47 species, aspen 9 species, birch and pine 8 species each, willow 5 species. Among other saprotrophs, 11 species dwelt on forest floor and 38 species were mycorrhizal. Five species (Cortinarius sanguineus, Incrustoporia stellae, Junghuhnia collabens, Osteina undosa, Stropharia aeruginosa) are red-listed in the Republic of Karelia. In addition, there were 14 indicator species and 6 specialist species of forests of biological value. The data collected evidence that this forest site in a recreational area is of high biological value and can be used to substantiate its designation as a protected area. Preserving a favorable environment is of great importance for the city inhabitants.