Denver, CO – July 25-28 2019

Westin Westminster
10600 Westminster Blvd
Westminster, CO 80020

Standards of Behavior for Public Areas

  • No exposed breasts, genitals, or ass cracks
  • No walking of slaves or subs through the hotel on leashes, ropes or other bondage implements
  • No sexually suggestive propositions to hotel staff

Rule of Thumb: If you have a question about whether something is proper or not, it probably isn’t. Be safe—don’t do it!

Membership/Registration Costs

Early Bird until October 31 – $120
Before May 1 – $140
May 1 and after $160

Hotel Room Rates will be $169

Membership Cancellation & Refund Policy*

Notification before May 1 -100% refund
Notification between May 1 – May 31 -50% refund
Notification after May 31

*No Exceptions

Memberships purchased in the name of one person CANNOT BE TRANSFERRED into the name of another. You must cancel the first registration (according to cancellation policy), and the other person must register individually. You may not cancel a membership for another member even if you originally registered that person. Each individual person must contact us with their information and matching email address.  Memberships are not able to be carried over to another year.  We do not allow another individual to cancel a membership for someone other than themselves.  This even includes if you purchased the membership for someone other than yourself.  Once purchased the membership is now solely that persons membership and only allowed to be canceled by that individual whose name is on the membership.

Welcome From The Producer

Thunder in the Mountains is the premiere membership-only educational BDSM event that has been running since 1997. We continue to offer the best presenters, the largest play space, and the greatest staff anywhere. Thunder begins with the commencement of our event at the hotel on Thursday night.

On Friday we start at noon with the Vendor Mart opening and classes, and party in the evening. On Saturday we offer a full day of classes, presentations, and demonstrations by the best teachers in the world today. Our classes range from rope bondage, to whipping, to sexual kink play, to Master/slave dynamics and Dominance/submission, to the psychological aspects of BDSM and anything else you can think of. Classes stress not only the “how to’s” of BDSM and kink, but also stress all safety aspects that must be considered before engaging in such play. On Saturday evening we may feature a program produced specifically for this audience in this type of venue. These programs have ranged from leather contests, to drag shows, to talent shows, to comedy shows by professional comedians. This program is followed by the third party in our space. On Sunday, we offer another full day of classes by our presenters, as well as naked yoga classes, boot blacking and massage stations, and our vendor space.

This is an event for all types of people into all types of sexual kink and catering to all experience levels. We have classes for newbies as well as long time players. We welcome everyone who feels he or she has something to learn or is curious about. Hope to see you there.

Hotel Information

Please be aware that the hotel will sell out, and if you want to make sure you get a room, you should contact the hotel as soon as possible and make a reservation. (Click Hotel on the top bar for specific details). Credit cards will be charged one night charge at the time the reservation is made, the remaining nights will be charged on check out. You will be required to book a room on Friday and Saturday night, there will be no more split nights available, due to many individuals not being able to make a reservation for the weekend because rooms are sold out on one night or the other and not both nights. The hotel will contact you first if the charge does not go through before canceling a reservation. Also please NOTE that if you wish to book multiple rooms you will need to contact Brian at for approval. Unfortunately, we had too many people booking multiple rooms again and canceling at the last minute.

You should also be aware, however, that if you do reserve a room and you decide you don’t want it, you MUST cancel your reservation before July 1, 2019, or you will be charged for one room night even if you do not attend. This policy is to prevent people who are not sure they really want to attend Thunder from reserving rooms and not canceling them until the last minute, thereby preventing others from getting rooms in the host hotel. So, reserve your rooms early, but if you don’t think you can attend, be sure and cancel them before July, 1, 2019, to prevent an unwanted charge to your card.

Once again, we would encourage you to make plans early so you won’t be disappointed. We are expecting a big crowd again this year, and our presenters are always the best in the nation. Membership in Thunder in the Mountains includes entry into the event, entry into all yearly organizational planning and meetings, and invitations to any other social events which may be sponsored during the year. Once you purchase a membership in your name, it cannot be transferred to another person. Anyone wishing to register for Thunder or to volunteer, or to make a reservation at the The Westin Westminster, or to apply as a vendor, or to enter the contest show should click on the corresponding heading on the side bar. I’d like to add that in our huge play space, we will still maintain our men’s, women’s, and pan areas like we did in prior years. If anyone has any questions about the website or the event, you can email me at We look forward to seeing you again.