Čertova pláň (974 m a.s.l.) is a well-defined summit on a lateral ridge in the western Krkonoše (Giant Mountains), tucked among spruce forests about 3.5 km south-east of Harrachov. It may not be the highest point around, but it rewards hikers with a peaceful, atmospheric walk through genuine mountain terrain well away from the busiest tourist routes.

The summit and its slopes are blanketed in dense spruce forest, giving the place a quiet, enclosed feel. On the south-eastern flanks the trees give way to open meadows with views down towards the hamlet of Hoření domky and the valley of Rokytnice nad Jizerou. The peak sits on a lateral ridge running westward from Lysá hora (1344 m a.s.l.), connecting through Studená (989 m) towards Čertova hora (1021 m) above Harrachov. The massif is built from metamorphic rocks — mainly mica schists with quartz veins and some gneisses.

• From Čertova hora via Studená — blue hiking trail, continuing onward to Dvoračky mountain hut; moderate difficulty.
• From Rokytnice nad Jizerou — yellow hiking trail along the southern slope leading to Vosecká bouda hut; moderate difficulty.

• The entire massif lies within Krkonoše National Park (KRNAP) — national park regulations apply throughout.
• Dvoračky mountain hut is located nearby along the blue trail route.

The stream Rýzí — a left tributary of the Mumlava river — separates the peak from the Plešivec massif to the north. The German name for this summit, Teufelsplan, shares the same 'devilish' meaning as its neighbour Čertova hora, making them a fitting pair of 'devil peaks' in the western Krkonoše.