How to enqueue a script on a specific URL that contains multiple parts

is_page() accepts only one optional parameter $page which should be (int|string|array) representing Page ID, title, slug, or array of such.

On a standard WP installation your code should look like this.

add_action( 'wp_enqueue_scripts', 'enqueue_date_picker_styles_and_scripts', 101);
function enqueue_date_picker_styles_and_scripts() {
    if ( is_page('page-slug-here') ) {   // Replace page-slug-here with slug of page at races/community/add
        wp_enqueue_style('bootstrap-datepicker-css', '//cdnjs.cloudflare.com/ajax/libs/bootstrap-datepicker/1.8.0/css/bootstrap-datepicker.standalone.css');
        wp_enqueue_script('bootstrap-datepicker-js', '//cdnjs.cloudflare.com/ajax/libs/bootstrap-datepicker/1.8.0/js/bootstrap-datepicker.min.js', array('jquery'),'1.8.0', true);
    }
}