Tuolumne Grove of Giant Sequoias to O'Shaughnessy Dam via Hetch Hetchy Road

You can typically find parking near the Tuolumne Grove of Giant Sequoias Restroom & Parking area. This is a good starting point for the touring bicycle route towards O'Shaughnessy Dam.

Yes, as this route is within Yosemite National Park, an entrance fee is required. For the Hetch Hetchy area specifically, you can use a National Park pass or purchase a 7-day pass, which costs $20 per bicycle. You can find more details on the official NPS website.

This route is classified as difficult for touring bicycles, requiring very good fitness. It largely follows paved roads, including the scenic Hetch Hetchy Road. Be prepared for significant and consistent climbing and descending, with an elevation gain of over 1,690 meters. The Hetch Hetchy Road section itself involves a mild but consistent climb, gaining about 1,320-1,332 feet over 6 miles with an average grade of 4.1%.

The best time to cycle this route is generally during the spring, summer, and fall months when the roads are clear of snow and the weather is favorable. Always check current road conditions and weather forecasts for Yosemite National Park before you go, especially for higher elevations.

No, dogs are generally not permitted on trails within Yosemite National Park, including the Tuolumne Grove itself. While they may be allowed on paved roads, it's best to check the specific regulations for the Hetch Hetchy area and other sections of the park on the official NPS website, as rules can vary and are often restrictive for pets to protect wildlife.

You'll encounter several notable sights. Starting near the Tuolumne Grove of Giant Sequoias allows you to visit majestic giant sequoias. Further along, you'll pass Crane Flat, and the scenic Hetch Hetchy Road offers views of granite peaks and waterfalls like Wapama Falls. The route culminates at the impressive O'Shaughnessy Dam, providing panoramic views of the Hetch Hetchy Reservoir.

This touring bicycle route is approximately 83.3 kilometers (51.8 miles) long and typically takes around 5 hours and 52 minutes of riding time to complete. However, this duration can vary significantly based on your fitness level, the number of stops you make for sightseeing, and weather conditions.

Hetch Hetchy is often considered Yosemite's "forgotten valley," offering a less crowded and more serene experience than the main Yosemite Valley. It features dramatic granite walls, lush forests, and the stunning Hetch Hetchy Reservoir, which provides unique vistas. The area also holds significant historical context regarding its role as a water source.

Yes, while primarily a road cycling route, it does briefly intersect or run alongside sections of other paths. These include the Smith Peak Trail, Camp Mather Trails, Poopenaut Valley Trail, Forest Route 2S87, Aspen Valley Road, Forest Route 1S25, Carlon Falls Trail, Garnett Ridge Road (4WD), Merced Grove Road, Forest Route 1S32, Tuolumne Grove Road, and South Landing Road.

Amenities are limited along the Hetch Hetchy Road itself. It's crucial to be self-sufficient and carry enough water, snacks, and any necessary supplies. There are restrooms and parking near the Tuolumne Grove of Giant Sequoias at the start, and some facilities may be available near the O'Shaughnessy Dam, but always plan to bring what you need.

Given the route's difficulty and length, you should bring plenty of water, high-energy snacks, a repair kit for your bicycle, and appropriate layers of clothing for changing weather conditions. Sun protection, a helmet, and a map or GPS device are also essential. Remember, amenities are sparse, so be prepared for a self-supported ride.