The first-ever PEST Conference will be held in The Stained Glass Hall of the Bolger Center, Potomac, Maryland ( <http://bolgercenter.dolce.com/> http://bolgercenter.dolce.com/) November 2nd through 4th, 2009. The goal is to bring together modelers from many disciplines to discuss parameter estimation and uncertainty analysis with a focus on the PEST suite of programs, and seek input from modelers on modeling needs to guide future development. The conference will commence with a message from John Doherty, the developer of PEST, and will follow with morning and afternoon sessions, each commencing with a key-note address given by a noted modeler. A poster session will be held one evening. Oral and poster submissions will be summarized in extended abstracts and/or full papers, published in electronic proceedings distributed on thumb drives. The conference will wrap-up with a question-and-answer session during which attendees will be able to ask questions and provide suggestions for future development directions. Keynote speakers include John Doherty (developer of PEST), Ghislain DeMarsily (developer of the Pilot Point technique), Jim Rumbaugh (ESI, developer of Groundwater Vistas), Jasper Vrugt (Los Alamos National Laboratory), and Randy Hunt (US Geological Survey). A one-day "Introductory PEST Course" will be held immediately prior to the conference, and a two-day "Advanced PEST Course" will be held immediately following the PEST Conference. Conference details including information on abstract submissions, early-bird discounted registration, accommodations, and the pre- and post-conference courses can be found at: <http://www.sspa.com/ThePESTConference> www.sspa.com/ThePESTConference Best wishes - Matt Tonkin, SSP&A Email: <mailto:pest@...> pest@...