Puerto Rico Guest® A Travel & Sports®, Inc. MasterGuide™ to Puerto Rico, © 2008 Select Language English | Español | Deutsch | Francais | Portugues Expert Help | Email this page | 34844 | Packages / Coupons / Auctions | Create Your MasterGuide™ | Advertise Río Toro Negro > Puerto Rico > Ciales > Attractions & Sights 787-871-3500 787-871-3743FX 787-871-1847FX Rt 149 Km 25.2, almost to Villalba. The Toro Negro River flows north to the Manatí River. Toward its lower course there is a hydroelectric plant. All photos © by their respective owners. Photos may not be reproduced in any form without the owners written permission. Symbol Key: Sponsors, Attractions & Sights.