The Three Rivers Convention Center stands as a cornerstone of the Tri-Cities region, providing a modern and versatile environment for a wide array of gatherings. Situated in Kennewick, Washington, this facility has long served as the primary hub for conventions, trade shows, and community celebrations. As of mid-2026, the center is undergoing a transformative period marked by a significant expansion project that nearly doubles its capacity and introduces state-of-the-art amenities designed to meet the evolving demands of regional and national event planners. This evolution positions the Three Rivers Campus as a premier destination in the Pacific Northwest, bridging the gap between large-scale logistical needs and the intimate hospitality characteristic of the Washington wine country.

The Vision of the 2026 Expansion

The current expansion of the Three Rivers Convention Center represents one of the most substantial public-private investments in the history of Kennewick. This project is a response to the growing demand for flexible, large-scale space that can accommodate events previously forced to look toward larger metropolitan areas like Seattle or Spokane. The centerpiece of this expansion is the addition of a 60,000-square-foot exhibit hall. This new space is specifically engineered to handle high-impact events, including industrial trade shows, large-scale consumer expos, and major sporting tournaments.

By integrating this new hall with the existing 75,000 square feet of modular space, the facility now offers a seamless flow for multi-faceted programs. The architectural design emphasizes modern aesthetics with open, flexible layouts that allow for rapid transitions between event types. This expansion was strategically funded through the Kennewick Public Facilities District in partnership with private developers, ensuring growth that supports the local economy without placing a new tax burden on the residents of the Tri-Cities.

Core Facilities and Spatial Configuration

Prior to the 2026 upgrades, the Three Rivers Convention Center was already recognized for its intuitive single-level design. The facility’s layout is centered around the Great Hall, a 21,600-square-foot pillarless space that serves as the anchor for general sessions, banquets, and smaller exhibitions. The Great Hall is highly adaptable, capable of being divided into three or four smaller sections to accommodate concurrent breakout sessions or more intimate gatherings.

Complementing the Great Hall are nine dedicated breakout rooms, totaling approximately 13,000 square feet. These rooms are designed for board meetings, training seminars, and organizational offices. Each space features high ceilings and sectional glass panel walls, which contribute to a sense of openness while maintaining acoustic privacy. The 14,000-square-foot Grand Foyer serves as the primary circulation artery, featuring a sparkling glass facade that allows for natural light and provides an elegant backdrop for registration, networking receptions, and social pre-functions.

With the completion of the new exhibit hall, the total indoor space effectively caters to a diverse range of industries. The expanded pre-function area and the extended lobby improve the overall guest experience by reducing congestion during high-traffic intervals. The addition of a new, large-scale industrial kitchen significantly boosts the center’s food and beverage capabilities, allowing for the simultaneous service of high-quality meals to thousands of attendees across multiple halls.

The Integrated AC by Marriott Hotel

A pivotal component of the 2026 transformation is the introduction of the 162-room AC by Marriott hotel, which is directly connected to the expanded convention center space. This development addresses a critical need for high-end, on-site lodging for keynote speakers, exhibitors, and attendees who prioritize convenience. The hotel’s design aligns with the sleek, modern architecture of the convention center, offering a seamless transition for guests moving between their accommodations and event venues.

This connection enhances the "stay and play" appeal of the Three Rivers Campus. Guests have immediate access to the hotel’s refined lounge and dining options, which complement the center’s own catering services. For event planners, the availability of a connected hotel simplifies the logistics of room blocks and VIP transportation, making the Three Rivers Convention Center a more competitive choice for national associations and corporate retreats.

Advanced Technology and Event Support

Modern events require more than just square footage; they require a robust technical infrastructure. The Three Rivers Convention Center has invested heavily in smart technology and communication systems. High-speed fiber-optic internet is available throughout the facility, supported by a dedicated IT team capable of managing complex networking requirements for hybrid meetings and live-streaming sessions.

In recent years, the facility integrated a smart lighting system that allows for programmable arrangements, enabling planners to customize the ambiance of the halls to match branding or thematic requirements. The Toyota Center, which is part of the same campus, features large LED TV boards that can be leveraged for cross-promotion and event announcements. Furthermore, the venue is equipped with professional-grade audiovisual systems, including built-in sound reinforcement and versatile rigging points for custom lighting and stage designs. Dedicated event managers are assigned to each booking, providing a single point of contact for technical coordination, catering, and logistical setup.

Sports Tourism and Large-Scale Competitions

The 2026 expansion was specifically designed with the booming sports tourism market in mind. The new 60,000-square-foot exhibit hall features specialized flooring options and ceiling heights suitable for indoor sports such as basketball, volleyball, gymnastics, and cheerleading competitions. By being able to host multiple courts or mats simultaneously, the center can now accommodate regional tournaments that draw thousands of athletes and their families to the Tri-Cities.

The proximity of the Toyota Arena and Toyota Center further enhances these capabilities. The entire Three Rivers Campus functions as a multi-venue sports complex, allowing organizers to run championship games in the arena while holding qualifying rounds or vendor villages in the convention center. This concentration of facilities makes Kennewick an ideal host for state and regional athletic associations looking for a centralized, accessible location.

Economic Impact and Community Growth

The expansion is more than an infrastructure project; it is an economic engine for the region. Estimates suggest that the upgraded facility will attract nearly 200,000 annual attendees, generating over 70,000 additional hotel room nights per year. This influx of visitors supports a wide network of local businesses, including hotels, restaurants, and retail shops. The projected annual boost to regional spending is estimated at approximately $130.8 million, with a significant increase in local tax revenue that is reinvested into community projects.

By retaining events that had previously outgrown the space and attracting new high-value conventions, the Three Rivers Convention Center fosters job creation and supports the professional services industry in Kennewick. The partnership between the city and private developers serves as a model for sustainable growth, demonstrating how strategic investments in public facilities can catalyze private development in the surrounding Vista Entertainment District.

Exploring the Vista Entertainment District

Visitors to the Three Rivers Convention Center benefit from its location within the Vista Entertainment District, a vibrant area designed for walkability and convenience. Within a short distance of the venue, there are over 25 restaurants ranging from quick-service options to upscale dining. The Columbia Center Mall, one of the largest shopping destinations in the region, is located just blocks away, offering a variety of specialty retailers and department stores.

For those looking for entertainment outside of convention hours, the area features the AMC Classic Kennewick 12 theater and several specialty recreational facilities. The ongoing redevelopment of the nearby Vista Field is also introducing new residential and commercial spaces, creating a lively urban atmosphere that enhances the overall experience for out-of-town guests. This density of amenities ensures that attendees have plenty of options for post-event socializing and relaxation.

The Gateway to Washington Wine Country

One of the unique advantages of hosting an event at the Three Rivers Convention Center is its location in the heart of Washington’s wine country. With over 200 wineries within a 50-mile radius, the Tri-Cities region offers unparalleled opportunities for pre- and post-convention tours. Many event planners incorporate local wine tastings or vineyard visits into their programs, providing a memorable experience that distinguishes their event from those held in more traditional urban centers.

The region’s climate, characterized by over 300 days of sunshine annually, makes it an ideal destination for outdoor activities. Visitors can enjoy scenic riverfront parks along the Columbia River, ten championship golf courses, and extensive trail systems for hiking and biking. The confluence of the Snake, Yakima, and Columbia Rivers—after which the center is named—provides a stunning natural backdrop for the city and offers various water-based recreational opportunities.

Logistics, Access, and Parking

Accessibility is a key factor in the success of any large-scale venue. The Three Rivers Convention Center is conveniently located near major highways, making it easily accessible for those driving from Seattle, Portland, or Boise. For those traveling by air, the Tri-Cities Airport (PSC) in Pasco is just a short drive away, offering direct flights to several major hubs across the Western United States.

The campus provides ample parking with over 1,500 spaces available for guests, including improved access to the Toyota Center and Arena. Public transit options, such as the Ben Franklin Transit system, offer reliable connections throughout the Kennewick, Pasco, and Richland areas. The facility is also designed to be fully ADA-compliant, ensuring that all guests can navigate the spaces comfortably and safely.

Planning and Booking Your Event

As the 2026 expansion nears completion, the Three Rivers Convention Center has opened reservations for its new spaces. The venue’s experienced sales and management team works closely with planners to determine the most effective use of the available halls and breakout rooms. Whether it is a corporate gala, a multi-day convention, or a public trade show, the staff provides comprehensive support through the RFP (Request for Proposal) process and beyond.

Planners are encouraged to submit detailed information regarding their event requirements, including estimated attendance, preferred dates, and specific technical needs. The center’s dedicated event managers assist with everything from floor plan design to catering menus, ensuring that every detail is addressed well in advance of the event date. The inclusion of a dedicated on-site internet café serving local gourmet coffee and wines provides a convenient spot for informal meetings and breaks during busy event schedules.

Looking Ahead

The transformation of the Three Rivers Convention Center is a reflection of the Tri-Cities' growth and its commitment to providing world-class facilities. By late 2026, when the expansion is fully operational and the AC by Marriott is welcoming guests, the center will be positioned as one of the most versatile and modern event spaces in the Northwest. The combination of expanded exhibit space, increased meeting room capacity, and an integrated hotel makes it a comprehensive solution for even the most complex event requirements.

As the region continues to evolve, the Three Rivers Convention Center remains at the forefront, adapting to new trends in the meetings and conventions industry while maintaining the high standards of service and hospitality that have defined it since 2004. For organizations looking to host an impactful event in a location that offers both professional excellence and regional charm, this Kennewick landmark provides the ideal stage.