At the end of the Yarkon path you can take a riverside trail. It goes through the orchards and fields and is marked with orange, blue white marking (Israel National Trail).
The riding is good fun, some sand a short climbs but not terribly demanding technically. The trail runs 20+Km inland towards the source of the Yarkon and from here connects to other trails – one of which winds for 90+Km uphill to the Biblical Zoo in Jerusalem!! (Around 120Km in total from the zoo to the sea.)