Arvada is a city located in Jefferson County, Colorado. The climate in Arvada is semi-arid, with hot summers and cold winters. The city is situated along the banks of Ralston Creek, which is fed by runoff from the nearby Rocky Mountains. The hydrology constituents in the area include high levels of sediment and nutrients, which can affect water quality in local streams and rivers. Despite this, there are many opportunities for outdoor recreation in Arvada, including hiking, biking, and fishing. The city boasts over 90 parks and miles of trails, including the popular Apex Park and Van Bibber Open Space.