4 Great Locations! Sioux Falls SD, Beresford SD, Sioux City IA, and Sergeant Bluff IA

Contact us at 712-252-2115 for Sioux City and Sergeant Bluff locations

Contact us at 605-361-4399 for Sioux Falls and Beresford locations

Ultimate Fitness is a locally-owned 24-hour fitness center located in Sioux Falls SD(women’s only), Sioux City IA, Sergeant Bluff IA and Beresford SD.

We are not a franchise and we pride ourselves in giving members a clean, motivating and non-intimidating atmosphere. If you have never joined a gym and you would like to start, we make it incredibly easy and fast.



Small Group Personal Training

Grab your friends and sign up for our small group training! Start now! Sioux Falls location only!

Get motivated now! Register today!

Sioux City XT45 Classes

are held Monday-Thursday at 5:30am, Noon and 5:45pm.

Call to register today! 712-252-2115

Class cost: $79/month for unlimited classes

Classes are available for members and non-members.


Got a new debit or credit card?

Update your payment info online now!


Student Summer Special

99 days for $99

Immediately upon online registration your membership includes 24-hour access to fitness, tanning and classes! Must be a student between 16 and 21 years of age.

Join Online Update now Sioux City or Sergeant Bluff Get Info Register Now Beresford or Sioux Falls