The park has an "upper part" on the bluffs and "lower part" down by the Santa Ana river. Although there are some tracks down the bluffs, please do not ride or walk down these, to prevent erosion - use the main connector. The park has a mixture of single track, path & fire road sized trails. Fairview Park is also part of/connects to the Santa Ana River Trail which runs from Newport Beach and Huntington Beach on the coast of Orange County to Riverside County and San Bernardino County.
2501 Placentia Ave, Costa Mesa, CA 92626
http://www.singletracks.com/item.php?c=1&i=6386