MarkWest Energy Partners to Present at the Credit Suisse Global Leveraged Finance Conference

MarkWest Energy Partners, L.P. (NYSE:MWE) announced today that Andrew Schroeder, Vice President of Finance and Treasurer, will present at the Credit Suisse Global Leveraged Finance Conference on March 26, 2008, at the Arizona Biltmore Resort and Spa in Phoenix, Arizona. MarkWest’s presentation will begin at 4:30 p.m. Eastern Daylight Time and is expected to last approximately 45 minutes. The presentation will not be webcast; however, the presentation materials will be available on MarkWest’s website at www.markwest.com under "Investor Relations / Presentations." MarkWest Energy Partners, L.P. (NYSE:MWE) is a publicly traded master limited partnership with a solid core of midstream assets and a growing core of gas transmission assets. It is one of the largest processors of natural gas in the Northeast and is the largest gas gatherer of natural gas in the prolific Carthage field in east Texas. It also has a growing number of other gas gathering and intrastate gas transmission assets in the Southwest, primarily in Texas and Oklahoma. This press release includes "forward-looking statements.” All statements other than statements of historical facts included or incorporated herein may constitute forward-looking statements. Actual results could vary significantly from those expressed or implied in such statements and are subject to a number of risks and uncertainties. Although we believe that the expectations reflected in the forward-looking statements are reasonable, we can give no assurance that such expectations will prove to be correct. The forward-looking statements involve risks and uncertainties that affect our operations, financial performance and other factors as discussed in our filings with the Securities and Exchange Commission. Among the factors that could cause results to differ materially are those risks discussed in our Form 10-K for the year ended December 31, 2007, as filed with the SEC. You are urged to carefully review and consider the cautionary statements and other disclosures made in those filings, specifically those under the heading "Risk Factors.” We do not undertake any duty to update any forward-looking statement.