functions.php

<?php

/**
 * Add Category to Event Breadcrumb
 * @author Bill Erickson
 * @link http://www.billerickson.net/code/add-taxonomy-to-genesis-breadcrumb
 * 
 * @param string $crumb, current breadcrumb
 * @param array $args, the breadcrumb arguments
 * @return string $crumb, modified breadcrumb
 */
function be_event_breadcrumb( $crumb, $args ) {

	// Only modify the breadcrumb if in the 'events' post type
	if( 'events' !== get_post_type() )
		return $crumb;
	
	// Grab terms
	$terms = get_the_terms( get_the_ID(), 'event-category' );
	if( empty( $terms ) || is_wp_error( $terms ) )
		return $crumb;
	
	// Only use one term
	$term = array_shift( $terms );
	
	// Build the breadcrumb
	$crumb = '<a href="' . get_post_type_archive_link( 'events' ) . '">Events</a>' . $args['sep'] . '<a href="' . get_term_link( $term, 'event-category' ) . '">' . $term->name . '</a>' . $args['sep'] . get_the_title();
		
	return $crumb;
}
add_filter( 'genesis_single_crumb', 'be_event_breadcrumb', 10, 2 );