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Port of Alta Loma

USTAJ🇺🇸USA

Port Location

About Port of Alta Loma

Alta Loma is a canal-based locality in California, USA. Situated in the foothills of the San Gabriel Mountains, it is not a maritime port and does not handle commercial shipping.

Background
Alta Loma is one of three unincorporated areas that became part of the city of Rancho Cucamonga, California, United States in 1977. The community is located at 34.15°N 117.60°W in the foothills of the south face of the San Gabriel Mountain range, near Cucamonga Peak and Mount San Antonio. Its ZIP codes are 91701 and 91737. Elevation ranges from 1,400 feet (430 m) to 3,000 feet (910 m). The name comes from the Spanish words for "high hill." Alta Loma had previously been known as "Iamosa".

Current Conditions

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Vessel Limits

Elevation
556m

Region

Subdivision
US-CA
Latitude
34.1167°
Longitude
-117.5833°

Nearby Vessels

Flag
Type
Name
Dist.

Identification

UN/LOCODE
USTAJ
Country
🇺🇸USA
Time Zone
UTC-8
Feature Type
CNL (Canal)

Classification

Type
Port

References & Identifiers

GeoNames ID
5342582 →
Wikidata
Q4735979 →
Wikipedia
Read on Wikipedia →
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Frequently Asked Questions

How do I navigate the approach to the Port of Alta Loma?+
The approach to Alta Loma is supported by 5 navigation aids within 50 nautical miles. The nearest is Canyon Lake Lighthouse at 30.3 NM to the SSE. Other aids include Parker'S Lighthouse (37.1 NM SW), Long Beach Harbor (37.2 NM SW), Long Beach Back Channel North Sector Light (38.1 NM WSW), Long Beach (38.2 NM SW). Mariners should consult the relevant chart and List of Lights for full approach details.
What major shipping routes pass near the Port of Alta Loma?+
The Port of Alta Loma is located within the US West Coast shipping lane — a major trans-Pacific trade route serving West Coast ports of the United States. This strategic position influences vessel traffic density, anchorage availability, and port scheduling.
How do I track vessels arriving at or departing from the Port of Alta Loma?+
You can track vessels near Alta Loma (USTAJ) in real time using MarineRadar. The platform displays live AIS positions of nearby ships, including vessel name, type, flag, speed, and course. Use the "Track Vessels Nearby" button on this page or search for USTAJ on the live map.
What are the operating hours and time zone for the Port of Alta Loma?+
The Port of Alta Loma operates in the UTC-8 time zone. Operating hours, VTS schedules, and pilot availability vary — vessel agents should confirm with the port authority in advance, especially for night arrivals or weekend operations.