The Susan River is a scenic waterway in northeastern California, originating in the eastern slopes of Lassen National Forest. It flows generally eastward through Lassen County, passing through the city of Susanville before eventually emptying into Honey Lake. The river's total length is approximately 40 miles, draining a watershed of about 850 square miles.

Paddling opportunities on the Susan River are diverse, offering experiences for a range of skill levels. The river is divided into three main sections: Upper, Devil's Corral to Susanville, and Lower. The Upper section, west of Susanville, features challenging Class IV-V rapids with technical drops and tight chutes, suitable only for expert paddlers. The 6.5-mile Devil's Corral to Susanville run is the most popular, offering Class III-IV whitewater ideal for intermediate to advanced paddlers. The Lower section provides a more relaxed Class II experience, perfect for beginners and families. The river's difficulty ranges from Class II to V, requiring varying levels of skill and experience. Paddlers should always assess their abilities and choose appropriate sections.

Spring snowmelt typically provides the best paddling conditions, usually from late March through May. However, water levels can fluctuate rapidly, so checking current flow rates is crucial before any trip.

The Susan River corridor supports diverse riparian ecosystems, home to various fish species, including rainbow and brown trout. The surrounding landscape features a mix of coniferous forests and high desert vegetation. Key landmarks include Devil's Corral, a scenic gorge where Highway 36 crosses the river, and the historic Bizz Johnson Trail, which parallels much of the river's course. The trail offers excellent opportunities for bike shuttles between put-ins and take-outs.

Primary access points include Devil's Corral trailhead for the upper sections and Hobo Camp picnic area in Susanville for the lower sections. Susanville serves as the main nearby city, offering amenities and services for paddlers.

Historically, the Susan River played a crucial role in the development of Lassen County, supporting early logging and milling operations. Today, it's an important recreational resource for the region.

Safety considerations include rapid water level changes, cold water temperatures, and remote sections with limited access. Paddlers should always wear appropriate safety gear and be prepared for self-rescue situations. While multi-day trips are not common due to the river's length, the surrounding area offers camping opportunities for those wishing to extend their visit and explore multiple sections of this dynamic California waterway.