La Union

La Unión is a small district and canton in the northern part of Cartago Province, Costa Rica, situated at the base of the foothills leading to Irazú Volcano. The canton is one of the smaller administrative divisions in the province, characterised by a mix of suburban residential areas and agricultural land. Its proximity to Cartago city — just a few kilometres to the south — means it functions largely as a commuter settlement while retaining a distinct small-town identity.

The area was historically part of the agricultural hinterland of Cartago, with dairy farming and coffee cultivation as the main economic activities. The canton was established in 1948 and has grown steadily as Cartago's urban area expanded. Today, the district of Tres Ríos, which lies within the canton, is the commercial and administrative centre.

La Unión enjoys the mild highland climate typical of the Central Valley, with temperatures averaging 18–22°C year-round. The dry season from December to April offers the clearest weather, while the rainy season (May–November) brings regular afternoon showers. The area sits at approximately 1,300–1,500 m elevation.

By Plane

The nearest airport is Juan Santamaría International Airport (SJO) in Alajuela, about 50 km west — roughly 1 to 1.5 hours by road. No direct public transport connects the airport to La Unión; take a taxi or shared shuttle to Cartago first, then a local bus.

By Car / Road

From Cartago city, La Unión is approximately 5–8 km north via Route 10 or local roads — about 10–15 minutes. From San José, take the Interamericana (Route 2) east through Cartago, then north; total about 35 km (40–55 minutes depending on traffic). Local buses run regularly from Cartago's terminal to the canton.

The canton is small enough to navigate by foot or taxi within the centre. For reaching outlying areas, local buses and colectivo taxis operate along main routes. A car is useful for visiting the more rural districts.

• Iglesia de Tres Ríos — the main church of the canton's commercial centre, a pleasant local landmark

• Foothill viewpoints — roads heading north toward Irazú offer views over the Central Valley

• Coffee and dairy farms — several small agricultural operations in the canton welcome visitors by arrangement

• Cartago city proximity — the Basilica of Our Lady of the Angels and the ruins of Santiago Apóstol are just minutes away

• Day trip to Irazú Volcano — the national park is about 30 km north, reachable in under an hour from La Unión

• Coffee farm visits — arrange tours at small producers in the surrounding hills

• Hiking — trails in the Irazú foothills offer moderate walks through agricultural and forested terrain

• Explore Cartago — the old capital's colonial architecture and museums are a short bus ride away

• Sodas in Tres Ríos — several family-run restaurants serve traditional casados, gallo pinto, and olla de carne; mains ₡2,000–3,500
• Restaurante local — typical Costa Rican fare with emphasis on fresh, local ingredients; mains ₡3,000–5,000

Vegetarian options are limited but rice, beans, and plantains are staples at every soda. Fresh fruit juices are widely available.

Coffee from local farms is excellent. Small bars in Tres Ríos serve Imperial and Pilsen beers. Tap water in the Central Valley is generally safe.

• Budget: Hospedaje Tres Ríos — basic rooms in the commercial centre; $15–25/night
• Mid-range: Hotel La Unión — comfortable family-run hotel; $35–55/night
• Upscale / heritage: Limited options in the canton; for upscale stays, Cartago city (10 min away) has more choice

Local agricultural products — coffee, cheese, and fresh produce — are available at small shops and roadside stands. Tres Ríos has a modest commercial district with banks, pharmacies, and general stores.

• Cartago (10 min) — provincial capital with the famous Basilica and colonial ruins
• Irazú Volcano National Park (45 min) — active volcano with dramatic crater lakes
• Paraíso (20 min) — gateway to the Orosi Valley and Lankester Botanical Garden
• San José (45 min) — national capital with museums, markets, and nightlife
• Turrialba (1 hr) — whitewater rafting and the pre-Columbian site of Guayabo