According to Official Guinness Records,
The longest RCP Mini-Z race track is 134.8 m (442 ft 3.08 in) long and is owned and operated by Catz-Sports GmbH (Germany), in Stapelfeld, Hamburg, Germany, as ascertained on 30 October 2010. The Mini Z is a popular line of 1:28-scale electric radio-controlled cars. The Catz-Sports GmbH race track is located in a converted tennis hall. It is open every day of the week and requires the payment of an entrance fee. Race cars may be hired in the facility. After the verification by a Guinness World Record Adjudicator, a race with 72 drivers divided into 8 groups was held on that track and lasted from 10 am until 8.30 pm.
For a complete list of 2010 records, please visit 2010 Guinness Records in Germany.