Unit 3

Grizzly Island serves as the primary visual reference point, a distinct landmass rising from surrounding marshland and offering elevated vantage points for glassing. Hammond Island provides secondary orientation on the unit's western flank. Grizzly Slough and Howard Slough function as the main water features and navigation corridors, defining natural travel routes through the marsh.

These sloughs are critical for both access and locating concentrations of waterfowl; their channels create the only meaningful topographic variation in an otherwise featureless plain.

Nearly all terrain sits within a few feet of sea level, with elevations ranging from below 46 feet to just 33 feet. Open plains dominate the landscape—94.6 percent is unforested lowland, creating expansive views across grassland and marsh. Water comprises 5.4 percent of the unit, concentrated in sloughs and channels rather than standing water bodies.

This consistently low elevation means no seasonal migration corridors; habitat type remains uniform year-round, shaped entirely by water management and seasonal flooding patterns typical of Sacramento Valley wildlife refuges.

The 10-mile road network provides fair access across the compact unit, with a road density of 0.71 miles per square mile. Roads are minimal but adequate for reaching key hunting areas; major roads are limited, making the unit feel less developed than surrounding terrain. Most access occurs from the unit's perimeter rather than internal routes.

The flat terrain and small size mean pressure can concentrate quickly around islands and sloughs during peak seasons. Strategic hunting favors early-season timing or low-traffic weekday entry; the lack of complexity works both ways—easy to hunt, easy to encounter other hunters.

Unit 3 occupies a compact 14-square-mile area of the Sacramento Valley floor, characterized by minimal relief and extensive managed wetlands. The unit lies entirely below 100 feet elevation, making it one of California's flattest terrain zones. Grizzly Island and Hammond Island protrude slightly as the only notable landforms, serving as visual anchors in otherwise uniform grassland and marsh.

The unit's small footprint and consolidated public ownership make it straightforward to navigate and hunt compared to larger inland units.

Water is abundant and defines the unit's character. Grizzly Slough and Howard Slough are the primary drainages, functioning as managed channels rather than natural creeks. Their reliability depends on seasonal and managed water levels rather than runoff patterns.

The sloughs provide consistent access to water and attract waterfowl seasonally; they're the unit's most valuable hunting feature. Standing water from seasonal flooding and marsh management occurs throughout, supporting emergent vegetation and waterfowl habitat. Water availability is rarely a limiting factor in this managed wetland system.

Elk are historically present but this is primarily managed waterfowl habitat, not traditional elk country. Elk presence depends on seasonal movement and water availability; any hunting targets transient animals rather than resident herds. The flat marsh terrain and open sightlines favor glassing from the islands and sloughs for spotting elk moving through grassland.

Early morning and late evening movement along slough corridors offer the best opportunity. Success relies on timing arrival before water levels drop or vegetation fully develops; the simplistic terrain means stealth and positioning matter more than route-finding. Spring and fall transitions see the most activity as elk move through the valley floor.