Donnell Reservoir, nestled in a steep rocky canyon of the Middle Fork Stanislaus River, offers a rugged outdoor experience five miles upstream from Beardsley Reservoir. While lacking developed facilities, it is a popular spot for day use, dispersed camping, fishing, and hiking, attracting visitors who enjoy its remote setting and opportunities for self-sufficient recreation. Access is via a rough, narrow road recommending high-clearance vehicles, with the reservoir open year-round, subject to winter road closures.
