The Warren River flows through Warren National Park in the Pemberton region of southwestern Western Australia, winding beneath towering old-growth karri trees that can reach up to 90 metres in height. The river corridor is lined with river banksias, peppermints, and Warren River cedar, with red coral vine and white clematis weaving over trunks and fallen logs. The overall character of the paddling is generally flatwater and leisurely, though conditions vary considerably by season.

Four canoe launch points are located along the Heartbreak Trail within Warren National Park: Banksia, Blackbutt, Maidenhair Bush, and Draftys campsite. These access points are well-maintained, with stairs leading down to the water and off-street parking available. Road access is sealed. The stretch between these points spans approximately five kilometres, though this may vary slightly. Upstream from Banksia, the river becomes impassable due to fallen logs. Approximately 500 metres downstream from the Maidenhair Bush carpark, a small rock obstruction creates a minor rapid in winter, which represents the furthest explored point in that direction.

Winter and spring rainfall enhances river flow and can create white-water conditions, including rapids. During summer, rocks and deadwood may obstruct the water; these can typically be traversed in winter or portaged around when necessary. The river contains numerous snags, granite outcrops, and other natural intrusions throughout its course. A multi-day trip to the coast by canoe is possible and is noted as taking a couple of days.

There is no kayak or canoe hire facility in the Walpole area, so paddlers must bring their own equipment. The Heartbreak Trail is not accessible to camper trailers, vans, or buses. A park entry fee applies. For those seeking detailed route information, the locally published book "Paddle Trails in the Walpole Wilderness" by Tim Gamblin covers ten flatwater wildlife explorations in the broader Walpole and Nornalup Inlets Marine Park area, including times, distances, and practical advice. It is available from the Walpole Nornalup Visitor Centre and can be posted within Western Australia for an additional fee.