The Annie River is a tidal river in Rinyirru (Lakefield) National Park in far north Queensland, flowing westward to join the North Kennedy River system before reaching Princess Charlotte Bay. Its tidal nature means water levels fluctuate significantly — spring tides can cause the river to rise dramatically overnight, and low tides expose steep, muddy banks that make launching and landing difficult.

The most critical safety consideration for paddlers is the frequent presence of large crocodiles. The area is explicitly designated as crocodile habitat, and large individuals are regularly sighted. Paddlers must exercise extreme caution at all times, including during launching and retrieval.

The only boat access point is a manual launch site with no trailer access. The bank is steep and muddy, and at least one account describes requiring a winch for trailer retrieval even for motorized boat users. Timing any launch or landing around tidal conditions is essential, as low tides make the steep bank particularly hazardous.

Access to the Annie River camping area requires a four-wheel-drive vehicle, and the road becomes impassable after rain. There are no facilities at the site. The camping area accommodates a maximum of 15 people across five car and trailer sites. From the river, paddlers have access to Princess Charlotte Bay. The nearby Marina Plains Homestead and professional fishing camps are not open to the public.