Gardiner Sinclair

Gardiner Sinclair Gas Station located 4 miles from the north entrance of Yellowstone National Park. We have two dinos!

03/02/2026

HOT DOG ROLLER IS BACK ONLINE!

2 for $6.00 special.

That's right: get two Johnsonville rolleiier items. Mix or match.

Promo good thru the month of March!

Thank you for supporting your local friends at the Gardiner Sinclair.

01/27/2026

Hey folks. In case you missed the release of this video earlier, we wanted to highlight this again. This is not only an amazing prize but even a greater effort to support all of these volunteers at the Upper Yellowstone Snowmobile Club. Stop in and get the details for the couple of weeks at least before the main event March 14th in Cooke City.

12/22/2025

Merry Christmas! Just wanted to share an update for our Holiday Hours.

Wednesday - Christmas Eve (December 24th:) Close early at 4 pm

Thursday - Christmas Day (December 25th:) CLOSED

Friday - Day after Christmas Day (December 26th:) CLOSED

Saturday - Resume normal business hours

NEW YEAR'S DAY (Thursday, January 1st) - CLOSED

FUEL PUMPS ARE ALWAYS ON 24/7.

Please plan appropriately for any retail needs around these closures.

We appreciate your support and understanding as we give time for our employees to spend time with their family/friends.

Thank you for supporting your local business! Cheers!

11/03/2025

To ALL of the Gardiner Sinclair customers: we have started our winter operating hours. Effective immediately.
7 am Opening
7 pm Closure
Feel free to call us at 406-848-9403 if you have any questions.
Thank you for your support and understanding!!!!!!

Hey Folks! Happy Halloween. Today only, from 3 pm till midnight, get an additional $0.10 off per gallon. Details belo...
10/31/2025

Hey Folks! Happy Halloween. Today only, from 3 pm till midnight, get an additional $0.10 off per gallon. Details below. Every dime helps and please take advantage. From your friends at Gardiner Sinclair.

06/03/2025

TODAY, JUNE 3, 2025, is DINO PAY DAYS. Just a friendly reminder that you will receive $0.30 cents off per gallon on ALL fuel at the Gardiner Sinclair. Come on over and take advantage of the fueling savings!!!

01/01/2025

Just a reminder, Gardiner Sinclair will be closed tomorrow, New Year’s Day. Normal business hours on Thursday, January 2nd.

Thank you to all of customers who supported us in 2024. Cheers to 2025!

12/23/2024

Mammoth/Gardiner Community Message Board

12/23/2024

Merry Christmas everyone!!! The Gardiner Sinclair will be closed Tuesday (Christmas Eve) and Wednesday (Christmas.). Allow everyone to spend the time with friends and family. Thank you for everyone’s support in 2024. Cheers!

08/31/2024

Hey folks. Please notice we will be changing to our fall operating hours starting on Monday, September 2, 2024.

Effective Monday, Sept. 2, 2024:

-Open: 7 AM
-Close: 8 PM

Thank you again for supporting this locally owned Sinclair!

Hello, Everyone!We’re excited to announce that Sinclair will be closing at 5 PM tomorrow for a staff celebration to mark...
08/22/2024

Hello, Everyone!

We’re excited to announce that Sinclair will be closing at 5 PM tomorrow for a staff celebration to mark the end of a successful season.

Thank you for your understanding and support! The pumps will remain open 24/7 for your convenience using the Dino Pay app or a credit card.

We appreciate your business and look forward to serving you again soon!

Address

375 U.S. Highway 89 S
Gardiner, MT
59030

Opening Hours

Monday 7am - 7pm
Tuesday 7am - 7pm
Wednesday 7am - 7pm
Thursday 7am - 7pm
Friday 7am - 7pm
Saturday 7am - 7pm
Sunday 7am - 7pm

Telephone

+14068489403

Website

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