Marramarra Creek flows through Marramarra National Park, located in the northern outskirts of Sydney at the junction of the Hawkesbury River and Berowra Creek in New South Wales. The park is described as one of the more remote and lightly visited natural areas within easy reach of the city, and paddling the creek offers access to bush scenery and Aboriginal and European heritage sites that are otherwise difficult to reach.

The creek is navigable by kayak and canoe, and paddling is one of the primary ways to explore the park's interior. A popular route connects Berowra Waters to Marramarra Creek via Berowra Creek, passing through Marramarra National Park with views throughout. The upper reaches of Marramarra Creek are noted as a long trip from all available launch points, so paddlers should plan accordingly and allow ample time. Three of the park's four campgrounds, as well as numerous small beaches, are accessible by kayak, making multi-day trips a practical option.

Two campgrounds sit along or near the creek. The Marramarra Creek Campground, reached via the Smugglers Ridge Track at approximately 6.4 kilometres from the trailhead, features picnic tables, firepits, and a pit toilet. The Marramarra Creek Orchard Campground is more basic, with picnic tables but no toilet, and can be reached by kayak as well as on foot via the Marramarra Ridge Trail at roughly 7.7 kilometres. Bookings are required for most campgrounds in the park; the Orchard Campground is the exception and cannot be booked online. The Gentlemans Halt campground on the Hawkesbury River also provides an option for paddlers exploring the broader waterway network.

The area supports birdwatching and wildlife observation alongside paddling. The waterways are described as suitable for boating, kayaking, and canoeing. An interactive paddling map is available through the Waterways Guide, a resource covering Australian waterways, which can assist with trip planning. For park information and bookings, the National Parks Contact Centre operates daily from 7am to 7pm and can be reached at 1300 072 757.