Eschenbach's concert tonight opens with the overture to Mozart's Die Zauberfl‹te and continues with a selection of the composer's arias sung by soprano Marisol Montalvo; the program concludes with Berlioz's Symphonie fantastique. Tomorrow evening, Eschenbach leads an all-Tchaikovsky program: the Violin Concerto, with 25-year-old German violinist Erik Schumann (in his Philadelphia Orchestra debut), and the Fourth Symphony (a work featured on the orchestra's most recent recording).

Milanov takes the podium for the Philadelphians' next performance in Vail, on July 9; the program features Dvoršk's In Nature's Realm Overture, Debussy's La Mer and a pair of works by Ravel: the Piano Concerto in G major, with soloist Jon Kimura Parker, and La Valse.

July 12 brings an all-Schubert concert under Graf's baton, featuring the Piano Concerto, with Jonathan Biss at the keyboard, and the "Great" Symphony (No. 9). The colorful July 13 program offers Chabrier's rhapsody for orchestra Espaê±a, Lalo's Symphonie espagnole for violin and orchestra (with Karen Gomyo as soloist), Respighi's Fountains of Rome and Stravinsky's Firebird Suite.

On July 14, Milanov concludes the Philadelphians' Vail residency with the same program with which he opened the orchestra's 2007 season at the Mann Center: Jennifer Higdon's Concerto for Orchestra and Beethoven's Ninth Symphony.

These Colorado concerts mark the Philadelphia Orchestra's first performances in the state in over 20 years; the ensemble's last appearance was in 1986 in Denver, under the direction of Riccardo Muti.

The Bravo! Vail Valley Music Festival, which celebrates its 20th anniversary this summer, features two other resident orchestras: the Rochester Philharmonic and the New York Philharmonic; the festival also presents over 50 soloists, ensembles and chamber musicians. For information and tickets, visit www.vailmusicfestival.org.