NPS-regulations state that e-bikes are prohibited where traditional bicycles are prohibited. Bicycles are not allowed on Roosevelt Island.
Whether this also means you cannot walk the bike on the island is unclear. We believe you can walk your e-bike.

Theodore Roosevelt Island - National Park Service - No Bikes Allowed - E-bike Lovers
The Superintendent Compendium and Record of Determination only refer to the prohibition of bicycling on Theodore Roosevelt Island. It is silent on the possession of a bicycle on the island.
As usual, please check the latest regulations before heading out as we do not provide legal advice on this website.
References
https://www.nps.gov/gwmp/learn/management/upload/E-Bike-ROD-GWMP-Final-9-26-19.pdf
https://www.nps.gov/gwmp/learn/management/upload/GWMP-Compendium-508-2.pdf

Gregory discovered e-biking after 20 years of overseas work as a project manager for the World Bank and USAID. He writes about e-mobility and e-biking in the DMV area, loves the outdoors (white water kayaking, hiking, and biking), and is an award-winning documentary filmmaker.
He lives with his wife, Janet, and Queenie the cat in Washington, DC.
He e-biked 4,685+ miles across America and raised $180,000 for a charity in 2022. He e-biked 7,460 miles across the United States in 2026 in support of the Johns Hopkins Merkin Center for Peripheral Neuropathy and Nerve Regeneration.
Favorite e-bike: Riese & Muller Super Charger Class 3 touring e-bike.
Dr. Gregory F. Maassen
FOUNDER E-BIKE LOVERS

