Pima County's "The Loop" Heads Into the 2026 Summer Window: How to Use the Region's 137-Mile, Free, Paved, Car-Free Shared-Use Greenway Across Tucson, Marana, Oro Valley, South Tucson, and Sahuarita Through the Cool-Morning Hours of June — The Rillito, Santa Cruz, Cañada del Oro, Pantano, and Julian Wash Segments, the Fitness Court Network, and the Trailheads That Make the System Work When the Afternoons Climb Toward 100°

Per Pima County Natural Resources, Parks and Recreation (NRPR), The Chuck Huckelberry Loop — Tucson's regional greenway — exceeds 137 paved, car-free, shared-use miles along the Rillito River, Santa Cruz River, Cañada del Oro Wash, Pantano Wash, Julian Wash, and Harrison Greenway corridors, connecting Tucson, Marana, Oro Valley, South Tucson, and Sahuarita with no motorized traffic and no use fee. The system is built on a Pima County Flood Control District backbone, programmed by Pima County NRPR, and supplemented with Regional Transportation Authority (RTA) funding for trailheads, undercrossings, and connection links. Per Visit Tucson, the Loop is regularly ranked among the country's longest interconnected metropolitan paved trail systems, and per Adventure Cycling Association and the League of American Bicyclists, the Loop is the structural reason Tucson holds a Gold-Level Bicycle Friendly Community designation. As the metro enters the June 2026 window — when National Weather Service Tucson normals push afternoon highs past 100°F most days and the North American Monsoon's official start date of June 15 begins building afternoon storm chances — the Loop's first three hours of daylight become the prime cool-morning window for families, runners, cyclists, and dog-walkers. Here is the May 31, 2026 sourced walk-through with the segment-by-segment access map, the trailhead and restroom inventory, the summer-heat playbook, and the real-estate context for buyers, sellers, and relocation households.