You could use the migrate.exe tool which comes with EF to go to specific migrations.
Migrate.exe MyApp.exe /startupConfigurationFile=”MyApp.exe.config” /targetMigration=”myTargetMigration”
Docs can be found at: http://msdn.microsoft.com/en-us/data/jj618307.aspx
Edit: How to use a connection string
Migrate.exe whereYourMigrationsAre.dll /connectionString=”Data Source=localhost;Initial Catalog=blah;whatever else you want to set” /connectionProviderName=”System.Data.SqlClient”