4236 North Arnold Mill Road
Woodstock, GA

Centrally-located in north metro Atlanta’s rolling horse country, Millstone Stables resides on the border of north Fulton and southeast Cherokee and is convenient to Woodstock, Milton, Alpharetta, Roswell, East Cobb, and Canton.

Millstone Stables

Heather Tinney

Head Trainer, Altogether Farm

Heather has been riding and training on the A circuit for over 30 years. She started out as a junior rider in the highly competitive Northeast region under such well-known instructors as Paul Valliere, Mike Henaghan, and George Morris. After turning pro, she moved into the jumper ranks. With help from Frank Gombolay, Anne Kursinski, and Aaron Vale, she competed with a variety of horses at levels from 1.20 meters up to Grand Prix.

Eventually, she decided to concentrate on training young riders and horses. Students range from novice Short Stirrup riders to experienced competitors tackling their first Grand Prix. Heather’s students have had success locally, with wins in the GHJA Pony and Junior Medal Finals, and on the national stage, with wins at the USEF Pony Finals and students qualifying for Equitation Finals and indoor circuits. Whatever your goals, Heather can help you achieve them.

First-Class Facilities

Brand new in 2018, Millstone Stables offers the best in stall board, pastures, horse care, and training amenities for you and your horse.


Morton built. 12 stalls. Brand new.

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Bright & Airy 12x12 stalls

Tongue & groove stall walls

Double Dutch doors to outside

Individual stall fans

Cupola ventilation fans

Interlocking rubber mat flooring

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Centrally-monitored fire alarm

Video monitoring

Central fly-spray system

LED barn lighting

On-site management

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Hot/cold water wash bay

Four additional outdoor wash areas

Climate-controlled office, break room, tack room, & bathroom with shower

4′ x 4′ private lockers available

Easy trailer access


16 Rolling Acres with Ample Riding Trails
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Nine Half-Acre Paddocks

5′ Four-Board fencing

Fescue grass

Professional pasture maintenance

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100' x 200' Lighted Arena

LED lighting

Fully irrigated

Well-drained cut clay, M10, river sand, & angular sand footing

Show-quality jumps

Cool-down perimeter trail


Custom grain regimen

Top quality hay

Twice-daily stall cleaning


Night check

Optional Services for Additional Fee

Clipping/mane pulling

Grooming services

Hand walking/grazing

About Us

Owners, Mike & Carolyn Purcell

Our two granddaughters are certifiably horse crazy. WE are certifiably crazy about our granddaughters, Madi and Cakki.

In 2011 we gave Madi four horseback riding lessons for her birthday, thinking she would maybe learn enough to do a little trail riding … kinda like we did as kids on our grandparents’ farms. Madi had much bigger aspirations. A few years later, Cakki was also dreaming of horses … and unicorns.

So what’s a truly awesome grandparent to do? Easy. Buy some land, build a barn, add horses (still searching for that unicorn), and they will come. That one small gift to Madi changed our lives dramatically, and we are loving every minute. Millstone Stables is our dream-come-true we didn’t know we had. We’re having a blast! Come join the fun!

CWD is where tradition and innovation meet. Here at Millstone Stables, we have been enormously impressed with the quality of the leather and balance of CWD saddles, and we thank them for being an Official Partner. Contact Regan Sundius for all your CWD needs at 404.449.5427.


Contact Us

Millstone Stables caters to English Hunter/Jumpers in search of top-notch boarding, facilities, and training in the Atlanta area. Interested? We'd love to hear from you!
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4236 North Arnold Mill Road
Woodstock, GA 30188