The sample demo of the angular ui router has this link for the start page:
full url of \'ui-router\' is / or http://angular-ui.github.io/ui-route
You can use $urlRouterProvide.otherwise. This will work if you try to navigate to a route url that has not been defined.
Taken from here.
function configurUIRoutes($stateProvider, $urlRouterProvider) {
$stateProvider
.state('myhomepage',
{
abstract: false,
url: '/myhomepageurl',
templateUrl: "some-path/staff-admin.html",
controller: 'HomeController'
});
$urlRouterProvider.otherwise('/myhomepageurl'); // User will be taken to /myhomepageurl if they enter a non-matched entry into URL
}