Search results for Mountain Biking are below:

http://www.litespeed.com/

It's not just titanium. It's Litespeed Titanium. Litespeed takes the highest quality titanium available and makes it better. -Litespeed

http://sevencycles.com/

Seven Cycles manufactures high-end bicycle frames from butted and straight-gauge domestically-sourced seamless 3-2.5 titanium, filament-wound carbon fiber, and the world’s finest steels. Seven offers a wide variety of frame styles—road, touring, triathlon, criterium, track, cyclocross, Mountain, suspension, and tandems—in the customer’s choice of stock or custom geometry. The company also manufactures a custom titanium stem and Mountain bike handlebar, and offers an exclusive carbon fiber road fork, as well aluminum handlebars, stems, and seat posts. -Seven Cycles

Seven operates in 15,000 square feet of industrial space in Watertown, Mass. Approximately 9,000 square feet are dedicated to manufacturing -Seven Cycles

http://breadwinnercycles.com/

Breadwinner Cycles makes handmade, custom bicycles for people who love to ride every day. Each bike we build is one-of-a-kind, a unique expression of craftsmanship, quality, beauty, and the joy and freedom we feel when we ride. -Breadwinner Cycles

Proudly built in Portland, Oregon. -Breadwinner Cycles

https://esigrips.com/

Established in 1999, we have spent almost 20 years providing superior products for the bicycle industry. -ESI

ESI (Extreme Steering, Inc.) is located in Northern Arizona and we are proud to have all our products being made right here in the USA. -ESI

https://lynskeyperformance.com/

family-owned and operated company with a burning desire to produce high-quality, custom-made, performance bicycle frames and parts, that are functional pieces of art -Lynskey

http://www.smartwool.com/

Our performance and casual socks made in the USA start with the world’s finest Merino. Then the best designers and skilled craftsman bring them to life, creating extraordinarily comfortable socks. We’ve been knitting American-made socks since SmartWool started over 20 years ago and our multi-generational sock makers know what it takes to make the best socks. -SmartWool

◊ Note-> Many of their products are made in the USA (socks mostly) but not everything they sell is USA made - so check the individual product descriptions for more information.

http://revelatedesigns.com/

Revelate Designs was founded in Anchorage Alaska in 2007, we’re dedicated to bikepacking gear and have been doing it longer than any other manufacturer. Eric Parsons founded Revelate Designs (originally Epic Designs) out of a passion for adventuring on two wheels. After a decade of adventuring with different setups, it was clear that some out of the box thinking using lighweight systems could be applied to the world of bike travel whether it be Mountain, road, or with fat tires. -Revelate Designs

Our main production facility is located in Springfield Oregon where all of our sewn products are made. We use as much domestic materials possible. Our partner shop there employees roughly 18 people and has decades of manufacturing expertise. -Revelate Designs

◊ Note-> Most of their products are manufactured in the USA - but their seam-welded bag items may not be.