Woo hooo! It's time to 'shoe!
Winter season is under way! There's much to celebrate & be grateful for. Escape into nature, get some healthy exercise while spending quality time with the ones you love. We will maximize the safety aspect & fun factor & invite you to experience truly one of a kind private all-inclusive snowshoeing, cross country skiing & Aspen's exclusive ON SNOW FAT BIKING instructional adventures. We've been proudly pioneering adventures since '96 & discovered the best part is sharing it!


August 2nd COVID UPDATE:
Pitkin County has achieved a very high vaccination rate with over 80% of residents with at least one vaccination. Aspen is a very safe haven, especially in the great outdoors! As it has the past 25 years, your safety & wellbeing will continue to be our #1 priority. We have 100% clean safety record; quite rare for local guided adventures. 

August UPDATE: Score with 4!
Celebrating our 25th Anniversary as “Aspen’s Adventure Sports School”, Sun Dog Athletics is offering Score with 4 Cycling Saturdays; a special program designed for beginner level cyclists offering alternating road and mountain bike clinics Saturdays from 9:30-11:00 AM. Limited to four riders, these clinics offer a very effective and affordable opportunity for aspiring riders who’d like to safely, quickly and significantly improve their cycling safety, performance, confidence and enjoyment. The cost is $54.00 per rider (two rider min.). For a schedule, details & to register in advance, please message or call Owner Erik Skarvan (970) 925-1069.


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We're open 8:00-5:00 daily.

Your questions are always welcomed!


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Quickly, safely & enjoyably GAIN NEW SKILLS & experience NEW THRILLS!


Mountain Biking Instruction in Aspen

As Western Colorado's original mountain biking instructors in 1996, we love to share mountain biking skills; our primary passion and save you years of time & effort as compared to "the school of trial & error" or tips from friends. You will also experience Aspen's most amazing mountain biking trails & Snowmass' sweetest singletracks.  

You will not only experience the best of Aspen mountain biking trails for your ability; you'll immediately improve your abilities for bike handling, climbing and descending. As pioneers in western Colorado, we developed mountain biking instruction and have dialed in our teaching process over 25 years of teaching and guiding. None of our "competition," including those who focus  on higher risk downhill mountain biking, even come close to our teaching and guiding experience. You benefit by maximizing your time, efforts and investment progressing quickly & safely. New skills mean new thrills...& less spills! Why just take an Aspen mountain biking tour, when you can be guided and significantly improve your riding with a highly passionate & experienced mountain biking instructor?

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Road Biking Instruction in Aspen

Gain new skills to become a road warrior!

You may be able to survive the ride, but why not thrive? We'll show you our favorite (& somewhat secret) Aspen & Snowmass road bike rides and techniques to immediately improve your safety, performance & enjoyment. New road biking skills focus on efficiency with body position & pedal stroke, climbing, descending, cornering & drafting. This is Aspen road biking adventure at its best!

Aspen Fitness Hiking

You and your family will experience the most amazing Aspen hiking trails and get a great workout at your own pace.

Why get an experienced instructor for hiking? We'll help you or your private group maximize the experience in terms of the most beautiful and appropriate location, offer you new skills and state of the art gear, including trekking poles, which add significant stability, propulsion & additional calorie burn. You'll see more stunning views, get a better workout and learn much more about hiking, the local flora, fauna and rich history than if you go on your own. 

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Experience the best of Aspen fat biking and release your inner child!

Fat biking is not only the fastest growing part of cycling; it's the hottest new sport on snow because it's LOL fun. As Colorado's original FAT BIKING OUTFITTERS, we'll take care of all the details, from the finest and fattest bikes, to the most gorgeous Aspen & Snowmass fat biking locations and key fat biking instruction to maximize the experience. Join us and get fat; the healthy kind!

Snowshoeing in Aspen & Snowmass

Feel the float at your own pace & put a smile on your face

Since snowshoeing has been our primary passion for over 30 years, your fully customized private adventure will be the most amazing outdoor experience of your time in Aspen. We offer you incredibly beautiful locations, state of the art instruction and Colorado made snowshoes, including the world's first EVA foam snowshoes from Crescent Moon Snowshoes. Are you ready to rock with Eva? Gear matters and so does passion and experience. No one has more snowshoeing experience in Colorado than Sun Dog!

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Flatwater Canoeing

Peaceful paddling through the North Star Nature Preserve

This is a truly one of a kind Aspen canoeing adventure. Learn a few basic paddle strokes or simply kick back for the most beautiful, peaceful escape on the magical meandering waters of the upper Roaring Fork River through our wonderful nature preserve. There may not be wild rapids, but there's plenty of wildlife to enjoy. Outrigger floats, like training wheels for a boat, ensure no sudden swimming adventure in the frigid snow-melt. This customized half day excursion is limited to one or two guests in "Winnie," our super stable & safe 17 foot Wenonah special edition Lewis & Clark canoe.

Our love of canoeing goes back over 50 years, to the days of growing up in Wisconsin. That love & experience translates directly to your one of a kind Aspen canoeing adventure.

Athletic Event Announcing

Professional Announcing and MC Services

Sun Dog Athletics Owner Erik Skarvan has become "The Voice" of Roaring Fork Valley events for over 25 years announcing local and national level endurance sports events, including road & mountain bike races, running races, triathlons, ski mountaineering & ultra races including most recently the popular Grand Traverse and  Power of Four races. He's been a live sports announcer at X Games, NORBA National Finals & the Blue Ribbon Alpine Challenge women's pro bike races (seen here). He's acted as an enthusiastic Master of Ceremonies at local fundraisers, live & silent auctions.

Erik brings his 35 year background as a multi-sport endurance racer, high energy, unique humor and local knowledge which informs & entertains the competitors & race fans like no one else. His motto "the next best thing to racing is talking about racing" reveals his love of event announcing. Erik Skarvan offers your event unparalleled racer insight, energy, passion, dependability and professionalism.


Please contact us today @ (970) 925-1069 message us via the form above or e-mail for further details, rates, reservations or just to talk shop. We love to share our passion for adventure sports! 

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