First Old River Lake spans approximately 268 acres in Miller County, Arkansas. This oxbow lake features one improved boat ramp at Hervey Access, providing a designated entry point for paddlers. The lake is located near the towns of Fulton and Garland, approximately 12 miles from major highways.

The lake's size and shape make it manageable for day trips, with roughly 220 surface acres of water to explore. The Arkansas Game and Fish Commission maps show both shallow and deeper sections, with contour intervals marked at 5 and 10 feet.

First Old River Lake is a typical oxbow lake formed by the Red River, with a curved shape that follows the river's former path. Several other oxbow lakes lie nearby, including Second Old River Lake (1.9 miles away) and various cut-off lakes, creating opportunities for multi-lake paddling adventures.

Basic facilities are limited to the improved boat ramp area. The lake's location in southern Arkansas means mild winter temperatures, with average air temperatures ranging from highs around 55°F (13°C) to lows around 36°F (2°C) during cooler months.

Millwood State Park is located in the vicinity, offering additional recreational opportunities and facilities. The lake is part of a network of similar water bodies in the region, including Clear Lake, Red Lake, and Bois d'Arc Lake, all within a 5-6 mile radius.

For trip planning purposes, paddlers should note that this is a rural location with limited amenities. The lake's proximity to the Red River suggests it may experience water level fluctuations based on river conditions. As with all oxbow lakes in this region, paddlers should be prepared for typical lowland conditions including possible muddy banks at access points.