The highest point of Sakritjärnberget mountain reaches about 135 metres a s l. On the southwest slope of the mountain grows a leafy spruce forest with lots of thick-growth aspen. On the mountain in the north part of the reserve there is a cultural relic in the form of a quartz quarry. The area is 0.7 square kilometres in size and snowmobiles are only allowed on designated trails.
The nature reserve lies in Luleå Municipality, about 25 kilometres west of Luleå and 11 kilometres northwest of Alvik. A logging road northward from road 94 passes close to the reserve.