I'm not sure in which area of Las Vegas you live, but here is the information that I have from The City of North Las Vegas Parks & Recreation Department:
Recreational Soccer - The recreational soccer league offers a chance for children 5-12 to learn and develop their skills for the exciting game of soccer. Teams are randomly created from individual registrations and volunteer coaches donate their time. Games are played on Saturdays and some weekdays, and practices are once a week on a day chosen by your coach.
Fall Season Registration:
Mail-in or Online: August 2-24, 2008
Walk-in: August 25-28, 2008
Season Starts: September 15, 2008
Location: Seastrand Park and Nature Discovery Park
Fee: $40 (includes 8 game season, t-shirt, awards, and referees)
Divisions: 5-6, 7-9, 10-12
5-6 year olds play 4v4 short sided games, and 7-9/10-12 age groups will play 7v7 games.
For more information or to register, contact the Silver Mesa Sports Department at 4025 Allen Lane, North Las Vegas NV 89032, call ###-###-####, or online at www.cityofnorthlasvegas.com
Their hours are: M-F 9:00am-5:30pm.