Küçük Akgöl is an alluvial dam lake ringed by natural forest, and the recreation ground beside it sits inside a second-degree natural conservation site.

Walking and mountain biking around the lake are what the provincial directorate names, along with picnicking. There is a private catering facility on the site and, separately, an independent picnic and recreation area.

One walk leads somewhere in particular: the historic Harmentepe castle can be reached on foot from the picnic ground, two kilometres away. The approach is on asphalt road and the area can be visited in any season.

When to go

Climate
Across Sakarya as a whole, monthly mean temperatures run from 6.3 °C in January to 23.6 °C in July; the mean stays between 15 and 25 °C in May, June, July, August, September and October; rainfall is heaviest in December (106 mm) and lightest in August (48 mm). Long-term means for 1951-2025 from the Turkish State Meteorological Service (MGM).Checked: September 22, 2026