Offering a vending machine and a lift, the 2-star Hotel Sierra Mar La Union is nestled a mere 5 minutes' walk from the Portmán Lighthouse and 2.8 km from Pawson Paintball. Located within 6 km of the Fuerte de Navidad, the hotel features 6 rooms with views of the city.

This smoke-free hotel offers a location right in the centre of La Union, in close proximity to the Mining Museum of La Unión. The Sierra Mar provides easy access to the Cabezo Rajao Mining Complex, which is around 10 minutes' walk away. Also, Pieza minera is situated 550 metres away. Standing 3.4 km away, Iglesia de Santiago Apostol Church is a hard-to-miss divine tourist destination. Calle Real bus stop is approximately a 5-minute drive away.

The rooms at Hotel Sierra Mar provide guests with complimentary Wi-Fi and a flat-screen TV with satellite channels, as well as comforts such as an air conditioner and a washing machine. The functional bathrooms include a bidet and a separate toilet. The bathrooms are equipped with a bidet, a separate toilet, and a washing machine, along with a hair dryer and bath sheets.

The onsite bar has a lounge and is decorated with a fireplace and armchairs. El Almacen Lounge Cafe is located next to the Sierra Mar La Union and serves South American dishes, 150 metres away.