Here are some top riding spots in California, Utah, Colorado, and Nevada:
**California:**
1. **Mendocino County**: Known for its scenic coastal trails and rugged terrain.
2. **Cambria**: Features a mix of forest and coastal trails with stunning ocean views.
3. **Santa Cruz Mountains**: Offers a variety of trails for all skill levels, including the infamous "Steamer Lane" trail.
4. **Mount Tamalpais**: Offers over 100 miles of trails, including the iconic "Dipsea Trail".
5. **Bodfish Off-Road Park**: A designated off-roading area with trails for ATVs and motorcycles.
**Utah:**
1. **Moab**: A world-renowned destination for off-roading, with over 300,000 acres of public land to explore.
2. **Green River**: Features a mix of high-adventure trails and more technical routes through the rugged landscape.
3. **Peaks Pass**: Offers challenging terrain and stunning views in the Uinta Mountains.
4. **Hurrah Pass**: A steep and technical trail with breathtaking views of the surrounding landscape.
5. **Bull Mountain**: A high-adventure trail with smooth dirt and steep inclines.
**Colorado:**
1. **Dakota Ridge**: Features a mix of high-adventure trails and more technical routes through the rugged landscape.
2. **Coal Canyon**: Offers a mix of singletrack and doubletrack trails with stunning views of the surrounding mountains.
3. **North Table Mountain**: A high-adventure trail with steep inclines and wide vistas.
4. **Mesa Top Loop**: A challenging trail with scenic views of the surrounding landscape.
5. **Bear Creek Lake Park**: A popular destination for mountain biking and trail running.
**Nevada:**
1. **Pahranagat National Wildlife Refuge**: Offers a mix of high-adventure trails and more technical routes through the rugged landscape.
2. **Pyramid Lake**: Features a mix of singletrack and doubletrack trails with stunning views of the lake.
3. **Berlin-Ichthyosaur State Park**: Offers a mix of high-adventure trails and more technical routes through the rugged landscape.
4. **South Eureka** : A mix of singletrack and doubletrack trails with scenic views of the surrounding landscape.
5. **Fort Churchill State Historic Park**: Offers a mix of high-adventure trails and more technical routes through the rugged landscape.
Please note that this is not an exhaustive list and there are many more riding spots in these states. It's also essential to check the local regulations, ensure you have the necessary permits, and ride safely and responsibly.