About

We strive to create a workout environment where everyone feels accepted and respected. That’s why at Planet Fitness Thornton, CO we take care to make sure our club is clean and welcoming, our staff is friendly, and our certified trainers are ready to help. Whether you’re a first-time gym user or a fitness veteran, you’ll always have a home in our Judgement Free Zone™.

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Planet Fitness Thornton treadmill cardio equipment
Planet Fitness Thornton stair climb cardio equipment
Planet Fitness Thornton elliptical cardio equipment
Planet Fitness Thornton arc trainer cardio equipment
Planet Fitness Thornton 30 Minute Circuit equipment
Planet Fitness Thornton PF360 equipment
Planet Fitness Thornton strength machine equipment
Planet Fitness Thornton strength machine leg equipment
Planet Fitness Thornton
Planet Fitness Thornton free weights
Planet Fitness Thornton stretching area
Planet Fitness Thornton Black Card Spa
Planet Fitness Thornton HydroMassage lounger
Planet Fitness Thornton HydroMassage bed
Planet Fitness Thornton tanning bed
Planet Fitness Thornton treadmill cardio equipment
Planet Fitness Thornton stair climb cardio equipment
Planet Fitness Thornton elliptical cardio equipment
Planet Fitness Thornton arc trainer cardio equipment
Planet Fitness Thornton 30 Minute Circuit equipment
Planet Fitness Thornton PF360 equipment
Planet Fitness Thornton strength machine equipment
Planet Fitness Thornton strength machine leg equipment
Planet Fitness Thornton
Planet Fitness Thornton free weights
Planet Fitness Thornton stretching area
Planet Fitness Thornton Black Card Spa
Planet Fitness Thornton HydroMassage lounger
Planet Fitness Thornton HydroMassage bed
Planet Fitness Thornton tanning bed

Memberships

Select the right membership for you
Select the Right Membership for You

Check out our affordable gym memberships. Tons of cardio and strength equipment. Join now!

PF Black Card®
Black Card Sale Extended!
$22.99/mo
plus taxes and fees
Offer Expires January 26th!
What you get
  • Unlimited Access to Home Club
  • Free Fitness Training
  • Use of Any Planet Fitness Worldwide
  • Bring a Guest Anytime
  • Use of HydroMassage
  • Use of Tanning
  • Use of Total Body Enhancement
  • Use of Massage Chairs
  • 50% Off Drinks
  • PF Black Card® Key Tag
  • Worldwide Travel Deals
  • 20% off Reebok products
How you get it
Startup Fee
$0.00
Monthly Dues
$22.99
Annual Fee
$39.00
Commitment no

Plus applicable taxes. Billed monthly to a checking account. Annual Membership Fee of $39.00 plus applicable taxes will be billed on or shortly after March 1st. State and local restrictions on tanning frequency apply. This offer has no monthly commitment.

See details ∨
Classic
Deal Extended! Last Chance to Join!
$10.00/mo
plus taxes and fees
Offer Expires January 26th!
What you get
  • Unlimited Access to Home Club
  • Free Fitness Training
  • Use of Any Planet Fitness Worldwide
  • Bring a Guest Anytime
  • Use of HydroMassage
  • Use of Tanning
  • Use of Total Body Enhancement
  • Use of Massage Chairs
  • 50% Off Drinks
  • PF Black Card® Key Tag
  • Worldwide Travel Deals
  • 20% off Reebok products
How you get it
Startup Fee
$0.20
Monthly Dues
$10.00
Annual Fee
$39.00
Commitment no

Plus applicable taxes. Billed monthly to a checking account. Annual Membership Fee of $39.00 plus applicable taxes will be billed on or shortly after March 1st. Membership can only be used at this location. This offer has no monthly commitment.

See details ∨

Virtual Tour

Amenities

Use of Any Planet Fitness Worldwide

As a PF Black Card® member, you’ll have the ability to use any of our 1,800+ locations.

Black Card Perk
Bring a Guest Anytime

Working out is better with a buddy. PF Black Card® members can bring a guest for free!

Black Card Perk
Use of HydroMassage

One of our most popular PF Black Card® benefits, HydroMassage beds offer a relaxing massage experience.

Black Card Perk
Use of Tanning

An exclusive benefit for PF Black Card® members.

Black Card Perk
Use of Total Body Enhancement

This all-natural red and infrared light therapy treatment is a benefit for PF Black Card® members.

Black Card Perk
Use of Massage Chairs

With a PF Black Card® membership, you can relax and unwind after your workout (or before – we don’t judge).

Black Card Perk
50% Off Drinks

Staying hydrated is key to a great workout. PF Black Card® members get 50% off select beverages.

Black Card Perk
PF Black Card® Key Tag

Use your key tag to access exclusive PF Black Card® amenities.

Black Card Perk
Worldwide Travel Deals

PF Black Card® Members can access discounted travel through our partnership with Leisure Time Passport®

Black Card Perk
20% off Reebok products

PF Black Card® members receive 20% off select products.

Black Card Perk
Unlimited Access to Home Club

Come in anytime, as often as you like. 

Black Card Perk
Free Fitness Training

Take a small group fitness class, check out our 30-minute express circuit or create a customized workout plan. It’s all free!

Black Card Perk

Class Schedule

It's our version of gym class without the annoying guy with the whistle.
View the Schedule
Planet Fitness Thornton functional equipment bosu ball, medicine balls, kettlebells, TRX bands
Planet Fitness Thornton abs area
Planet Fitness Thornton treadmill cardio equipment
Planet Fitness Thornton strength equipment
Planet Fitness Thornton arc trainer cardio equipment
Planet Fitness Thornton elliptical cardio equipment
Planet Fitness Thornton standup tanning booth
Planet Fitness Thornton locker rooms
Planet Fitness Thornton backlit vanity
Planet Fitness Thornton showers
Planet Fitness Thornton entrance front desk
Planet Fitness Thornton
Planet Fitness Thornton functional equipment bosu ball, medicine balls, kettlebells, TRX bands Planet Fitness Thornton abs area Planet Fitness Thornton treadmill cardio equipment Planet Fitness Thornton strength equipment Planet Fitness Thornton arc trainer cardio equipment Planet Fitness Thornton elliptical cardio equipment Planet Fitness Thornton standup tanning booth Planet Fitness Thornton locker rooms Planet Fitness Thornton backlit vanity Planet Fitness Thornton showers Planet Fitness Thornton entrance front desk Planet Fitness Thornton