The hot air balloon festival in Ohio the previous week is larger, but this one is closer to Pittsburgh (about 1 hour away). The festival goes on from Thursday through Sunday, with a Night Glow at 9 pm on Thursday and launches at 6 pm Friday, 6 am and 6 pm Saturday, and 6 am on Sunday.
Admission and parking are both free. Here's a description from their web site about the 2013 Western Pennsylvania Balloon Quest (click here):
July 25 - July 28, 2013
SCOTLAND MEADOWS PARK
2106 Camden Avenue
New Castle, PA United States 16101
4TH WEEKEND IN JULY
Number of balloons: 25
Year began: 1989
ALL proceeds benefit: UNION TOWNSHIP VOLUNTEER FIRE DEPARTMENT. Hot Air Balloons with a "Balloon Glow" scheduled on Thursday night @ 9:00 Pm - Balloon launches scheduled for Friday evening, Saturday morning and evening, Sunday morning....ALL LAUNCHES ARE BETWEEN 6 & 7 AM and PM.