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Route 21 – Congress/Silverbell

About Route 21

Route 21 serves an average of 11,000 passengers monthly, offering convenient access to key destinations. Notable stops include the El Rio Community Health Center, providing essential healthcare, and government buildings like City Hall, making it easier for passengers to access important services. It is also one of the many routes through a Sun On Demand zone, click the button below to learn about Sun On Demand!

Route 21 Schedule
Sun on demand

Key Destinations & Attractions

Discover Route 21, your easy connection to essential Tucson destinations! Starting in downtown and the Ronstadt Transit Center, this route takes you to cultural and community hubs, such as the Tucson Museum of Art.

As you make your way West on Congress Street make a stop at San Agustin Mercado, where shops, delicious food, and lively events create a vibrant community. Around that same area, you can visit important health centers like El Rio Community Health Center or St. Mary’s Hospital.

As the bus continues, pass by the Pima County Housing Center, a vital resource for housing support and community connections. Further along, you’ll spot Joaquin Murrieta Park, currently getting an exciting makeover with improvements on the way. Let Route 21 take you to explore Tucson’s westside!

Downtown Tucson

Route 21 drops you off at the heart of downtown at the Ronstadt Transit Center (RTC), Tucson’s central transportation hub. RTC connects you to multiple Sun Tran and Sun Express routes, plus the Sun Link Streetcar. In downtown Tucson you can find a mix of culture featuring an array of restaurants, museums, theaters and unique local businesses making it a popular spot for locals and visitor alike.

Visit Tucson
Mercado San Agustin

Mercado San Agustín Public Market is the anchor of the Mercado District. At its center it has an open-air courtyard to gather with friends and family. It is also lined with retail shops, restaurants, and services, all locally owned, including specialty foods and artisan-made goods that embody the Tucson vibe.

Mercado District
Pima County Housing Center

Pima County Housing Center provides citizens obtain resources and information on sustainable and affordable housing. Families can come to the Center for guidance and support to find trusted help during hard financial times, as well as information on purchasing a home, finding affordable rentals, and many other housing related services.

Pima County Housing Center
El Rio Commuity Health Center – Congress

El Rio Health Center on Congress Street provides a wide range of services to keep you healthy and thriving. From family medicine and behavioral health to dental care, radiology, and a convenient pharmacy, they’ve got your health covered. Plus, WIC services are available to support families in need.

El Rio Health
St. Mary’s Hospital

St. Mary’s Hospital is a premier destination for advanced heart and vascular surgery, stroke care, cancer treatment, and emergency services. Home to the Carondelet Heart & Vascular Institute, it delivers compassionate, personalized care from dedicated nurses, physicians, and surgeons.

St. Mary’s Hospital
Joaquin Murrieta Park

Joaquin Murrieta Park is a beloved spot known for its wide-open spaces, sports fields, and family-friendly vibes. Though it’s temporarily closed for exciting park improvements, the wait will be worth it as this community gem gets a fresh new look. Stay tuned for its grand reopening!

Did you know? Field #7 was renamed “Harry’s Field” after seventh grader Harry Hoskinson who was a member of the Western Little League Baseball.

Joaquin Murrieta Park

Plan Your Trip!

Get ready for a smooth and enjoyable ride! Find everything you need to plan your route, check schedules, and track your bus in real-time. Whether you’re commuting, sightseeing, or connecting across town, this section makes it easy to organize your trip and get you where you need to go with confidence. Below are different ways YOU can plan your trip, from visiting us online, downloading our Sun Tran app, or calling Customer Service.

Sun Tran Website

Ready to ride? Hop over to our website to plan your, check routes, and see schedules in a snap! Click the button below to find your bus, alerts and detours, and ride guides.

Where’s My Bus
Alerts & Detours
Ride Guides & Booklets

Sun Tran App

Get on the go with the Sun Tran App! Down our app to plan and track your ride. Find your route, see real-time arrivals, and make every trip easier.

Available on the App Store or Google Play!

Customer Service

Need help with trip planning or lost something while riding? Our friendly customer service representatives are just a call away! Whether it’s a question, complaint, or compliment, we’re here for you!

Call us!

(520) 792-9222 (TDD: 520-628-1565)

We also offer translation assistance! Dial the Customer Service number then press 3 and say the language you need in English.

Email Us!

suntraninfo@tucsonaz.gov