If you're motoring, take Hwy. 3 east of Santo Domingo. Metro Express Bus (tel. 809/566-7126) leaves from Santo Domingo daily every hour on the hour from 7am to 7pm; a one-way ticket costs RD$192. You can also flag down any guagua or midsize bus heading east.
Note: This information was accurate when it was published, but can change without notice. Please be sure to confirm all rates and details directly with the companies in question before planning your trip.