Norcal Flow Expeditions Mountain bike Tours San Francisco, Santa Cruz & Downieville in San Francisco, California

“I was on a business trip and only had one free day, so I really wanted to make the most of it. I contacted NorCalFlow just two weeks in advance to see what was possible, and even though it was a Sunday, Marcel got back to me right away. He called to go over all the details, make sure everything was clear, and understand exactly what I was looking for. Marcel is an outstanding guide. He quickly figured out my skill le”

— Rob M. · ★★★★★ · 2025-10-7

“Marcel is a master. Not only is he an excellent guide he has put together the perfect expedition company. They pick you up at your hotel, they put you on brand new premium bikes, and they also happen to be amazing humans. I cannot recommend this company more. I did the Pacifica Montara Mountain ride. Gorgeous!”

— Mike L. · ★★★★★ · 2025-11-16

“I had an epic 2 day ride in Downieville with Marcel. He did an incredible job getting me familiar with all the trails, pacing our ride, and keeping me safe. We did 22 miles the first day and climbed the Sierra Buttes, the highest point in the area. The 2nd day we did an all out epic exploration the Sierras including many lakes. Along the ride Marcel showed me all of the best trails and provided training to make me a ”

— Matt D. · ★★★★★ · 2025-8-4

“I recently had the pleasure of embarking on a two-day mountain biking adventure with Marcel, and it was truly an unforgettable experience. The first day we rode traditional mountain bikes, which was a great warm-up for the epic e-bike journey on day two. Marcel expertly paced the ride, taking us through the stunning Tahoe National Forest and down to some breathtaking lakes. He explained every section of the trail, en”

— Matteo F. · ★★★★★ · 2024-10-15

“Highly recommend Marcel and the team at Norcal Flow. Responsive to my enquiry from the other side of the world and coordinated a perfect 4 hour eMTB adventure out at Muir Beach today for me. Pick up included and great high end bikes. Chose perfectly suited trails to my ability. Friendly and fun times”

— Andrew W. · ★★★★★

“Marcel led our 14 yr old son and his friend on the Downieville Downhill and Flume rides. He was so patient, encouraging and took an extra hour for them to do jumps over and over. They were in heaven! Marcel organized everything-and provided bikes, helmets and protective equipment. Both boys have ridden quite a bit-but had no experience on rides like Downieville or as long as the flume. We felt very comfortable sendin”

— Kathryn A. · ★★★★★ · 2024-7-15

“My cousin my brother and I had an incredible experience with San Francisco Cyclery and NorCal Flow Expedition! Marcel Mijares and his team provided top-notch service, from the bike rental to the expertly guided tour. We tackled the Demo Forest and the Pacifica mountainsu2014gnarly, technical, and seriously challenging terrain, but absolutely worth every pedal stroke. Marcelu2019s knowledge of the trails and attention to safe”

— Marco M. · ★★★★★ · 2025-5-7

“I went 2 trips with Marcell at Downieville and had a blast in both. Marcell is a very knowledgeable guide and an amazing rider. Despite the short time (2 days), he was able to organize the riding very well and made sure we hit all the popular trails in Downieville area and even Lake Basin! The views are spectacular and the riding is one of the best in the US I've done! I'll definitely come back for more.”

— Tan Z. · ★★★★★ · 2024-7-23