ThunderDog Productions

ThunderDog Productions Content Creator of mountain biking video adventures

Testing the rekons for the race.   I think I love these tires!!!   Turned the bike from a jeep crawler into an audi allr...
09/02/2026

Testing the rekons for the race. I think I love these tires!!! Turned the bike from a jeep crawler into an audi allroad. Super fast. Super trustworthy on corners. Excellent braking. All smiles now. The race prep over the past 6 months is over. I just need to do it now.

It's official now.  Registered for the bike race, Sept 12, 2026.  I will post my Garmin live GPS link here at 7:15am, 15...
08/28/2026

It's official now. Registered for the bike race, Sept 12, 2026. I will post my Garmin live GPS link here at 7:15am, 15 minutes before start time, on Sept 12th. You can participate my watching the link, showing up at the finish line, or donating to my fundraising page for the race here ---

mark walker's Fundraising Page.

CRASH! 🌲💥Took a nasty spill clipping a tree going around a corner. I was doing what I was supposed to do, sighting my ex...
08/22/2026

CRASH! 🌲💥

Took a nasty spill clipping a tree going around a corner. I was doing what I was supposed to do, sighting my exit but lost track of my spacing and went from 13 MPH to 0 in 0.15 seconds (according to the Garmin, which picked up the impact).

The timing could not have been "better" actually. I’m in the final, highest-volume round of training during the hottest, most brutal humidity of the year. To anyone who says Arizona is a "dry heat": you have NO idea what happens when a monsoon storm gets trapped in the forest and starts evaporating!

Luck was on my side with the schedule, too. I had to shift my Saturday ride to Sunday anyway to pick up our dear friend Marianne from the airport tomorrow. Normally moving a key ride around is a headache. after this hit, it’s a blessing in disguise.

After passing 100,000 vertical feet of climbing this spring and grinding out big miles from Utah up to the Rim, I’m sitting on roughly 100 miles of training left before the Fire on the Rim race on Sept 12th. With Andy acting as my head personal trainer, keeping me on track with daily warm-up and recovery hikes, I’m already closing in on 200,000 total vertical feet climbed this year, which matches my entire total for ALL of last year.

All I have to do is finish what I set out to do, and I will start this race as a winner no matter what unfolds. But make no mistake: I don’t plan on just going for a "bike ride." This time, it’s MY turn. Those who have followed the journey this year know the difference. Those who are used to my failings or my back-of-the-pack finishes... well, you’re in for one hell of a surprise.

Leadville 100 participant Charlie Hagan famously said, "If you don't enjoy the journey, you will not enjoy the race." I forgot that last year, and I paid severely. This year, I made sure to live it every single mile.

Time to heal up, dial it in, and finish this. See you at the finish line.

Thunder DOG goes to Thunder Mountain!
07/21/2026

Thunder DOG goes to Thunder Mountain!

Sometime a trail comes along and changes your life. NO NARRATION, ...

The first ride of my epic road trip goes LIVE at 8AM this morning!!!!Come join me on this wonderful, fun adventure as I ...
07/12/2026

The first ride of my epic road trip goes LIVE at 8AM this morning!!!!

Come join me on this wonderful, fun adventure as I plunge 3400 feet from the top of a ski resort to the bottom of a golf course!

The WOW Trail in Park City UTAH is a 9ish mile downhill ride that f...

IN FOUR DAYS, the return to the motherland begins! UTAH!Last time I visited, it was a recon mission—all scouting, data c...
06/15/2026

IN FOUR DAYS, the return to the motherland begins! UTAH!

Last time I visited, it was a recon mission—all scouting, data collection, and long hours behind the wheel. I caught a glimpse of what Moab and the middle-of-nowhere backcountry had to offer, but this time? This time, the rubber is hitting the dirt for real.

I’m swapping the "recon" for total immersion. First stop: Richfield to tackle the legendary Spinal Tap—a massive shuttle-access downhill trail. Honestly, it’s the mountain bike equivalent of the ultimate snowcat skiing trip I always dreamt of but didn’t have the engine for… until now.

I’m coming in strong, and I’m documenting the whole thing. Get ready for a new video series dropping soon, packed with all the red dirt, questionable trail-side shenanigans, and mandatory post-ride milkshakes. I couldn't decide if I wanted to run the fat wheelset on slickrock trail or not, so I will probably do BOTH. The practice loop at sunset with the fat wheels and the full course at sunrise on the 29er plus setup.

Here is my last trip smashed into a 2 minute edit with my brother Andy as Executive Producer. He is happily stepping back into that role for this production too!

https://www.youtube.com/watch?v=MWNl0k1a6k0

In 2020, I went on a 2400 mile road trip. Starting in California, ...

well well well, once I started to look at the trail thru my "ski goggles". it was only a matter of time.....
04/04/2026

well well well, once I started to look at the trail thru my "ski goggles". it was only a matter of time.....

https://www.youtube.com/shorts/ST1TvdxYDEs they say make a video with your dog having zoomies to gospel music
12/26/2025

https://www.youtube.com/shorts/ST1TvdxYDEs
they say make a video with your dog having zoomies to gospel music

Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube.

Changing "gears" haha..  Actually, losing the gears for shoes for a half marathon on Valentines Day.  10 weeks.  to do a...
12/11/2025

Changing "gears" haha.. Actually, losing the gears for shoes for a half marathon on Valentines Day. 10 weeks. to do a 12 week program which was the shortest one I could find.

I also decided to do it in under 2 hours, not just finish.

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