Worcestershire pairs the Malvern Hills — home to the Three Counties Showground, a genuinely significant regional agricultural and equestrian events venue — with the fruit-growing Vale of Evesham and good mixed farming land across much of the rest of the county. It has a solid, practical horse culture without being especially expensive.
The Malvern Hills themselves offer some hardier hill grazing and riding, while the Vale of Evesham and surrounding lowland around Pershore give gentler, more typical family-pony pasture. Worcestershire's position, bordering both Herefordshire and Warwickshire, makes it easy to widen a search in either direction — toward the Welsh borders for native and cob types, or toward the Midlands for a broader general mix, and the county town of Worcester itself is a convenient, well-connected base for either approach.