Baytex Energy Trust Announces Increase To Exchangeable Share Ratio

Market Wire, May, 2008

Baytex Energy Trust (TSX: BTE.UN) (NYSE: BTE) is pleased to announce the increase to the Exchange Ratio of the Exchangeable Shares of Baytex Energy Ltd. from 1.74178 to 1.75565. This increase will be effective on May 15, 2008.

The increase in the Exchange Ratio is calculated as follows:

Record Date of Baytex Energy Trust Distribution:             April 30, 2008
Opening Exchange Ratio:                                             1.74178
Baytex Energy Trust Distribution per Unit:                            $0.20
Five-day Weighted Average Trading Price of BTE.UN
 (prior to the end of April):                                        $25.12
Increase in Exchange Ratio (xx):                                    0.01387
Effective Date of the Increase in Exchange Ratio:              May 15, 2008
Exchange Ratio as of Effective Date:                                1.75565

(xx) The increase in the Exchange Ratio is calculated by multiplying the
     Baytex Energy Trust Distribution per Unit by the Opening Exchange Ratio
     and dividing by the Five-day Weighted Average Trading Price of BTE.UN.

A holder of Baytex Energy Ltd. Exchangeable Shares can exchange all or a portion of their holdings at any time by giving notice to their investment advisor or Valiant Trust Company at its principal transfer office at Suite 310, 606 - 4th Street S.W., Calgary, Alberta, T2P 1T1 (telephone: 403-233-2801).

The Baytex Energy Trust Exchangeable Shares (the "shares") were issued in connection with the Plan of Arrangement which resulted in the conversion of Baytex Energy Ltd. to a trust structure. The shares are not traded on any public stock exchange, and it is unlikely that further shares will be issued in the future. No action is required by holders of the shares or by holders of Baytex Energy Trust units as a result of this press release.

Baytex Energy Trust is a conventional oil and gas income trust focused on maintaining its production and asset base through internal property development and delivering consistent returns to its unitholders. Trust Units of Baytex are traded on the Toronto Stock Exchange under the symbol BTE.UN and on the New York Stock Exchange under the symbol BTE.

Contacts: Baytex Energy Trust Ray Chan Chief Executive Officer (403) 267-0715 Baytex Energy Trust Anthony Marino President and COO (403) 267-0708 Baytex Energy Trust Derek Aylesworth Chief Financial Officer (403) 538-3639 Baytex Energy Trust Erin Hurst Investor Relations (403) 538-3681 Toll Free Number: 1-800-524-5521 Website: www.baytex.ab.ca