Las Vegas Gay Pride is built around two key events: the Las Vegas Pride Parade, held on Friday, April 30, at 8 pm; and the Las Vegas Pride Festival, which takes place the following day, Saturday, May 1, from noon until 10 pm. Keep in mind, though, that there are a number of smaller gatherings and parties leading up to the big weekend – here’s a full calendar. 
Las Vegas’ first Gay Pride took place in 1983 – there’s a nice synopsis of the event’s history on the Pride Las Vegas website.
More than 10,000 people attended in 2009.
Las Vegas performer Frank Marino acts will be the Grand Marshal on Friday during the Gay Pride Parade in downtown Las Vegas.
The Pride Parade takes place in downtown Las Vegas at 8 p.m. on Friday, April 30. The parade route is along 4th Street from Charleston Blvd. to Ogden Avenue.
In 2009, organizers added a Parade Pre-Party, which takes place on Friday at 5:30 pm in the pedestrianized Fremont Experience section of downtown’s historic Fremont Street.
The Las Vegas Pride Festival is set at the Clark County Government Center Amphitheater at 500 S. Grand Parkway on Sat., May 1 from noon until 10. This action-packed, all-day event always features a slew of notable entertainers.
Of course, additionally, numerous gay bars as well as gay-popular restaurants, hotels, and shops have special events and parties throughout Pride Week. Please check local gay papers and websites, such as Q Vegas and GayLasVegas.com, for details.
Vegas Backstage Access (VBA) 