Sure, let's revise the itinerary to remove Dinosaur National Monument and focus on other scenic sites and national parks in Colorado, keeping it as a 10-day trip for a more relaxed pace.

Day 1: Arrival in Denver

• Fly into Denver International Airport
• Pick up rental car
• Stay overnight in Denver: Explore downtown Denver, visit Union Station, and enjoy a meal at one of the city's renowned restaurants.

Day 2: Denver to Colorado Springs

• Drive to Colorado Springs (1.5 hours)
• Visit Garden of the Gods: Stunning red rock formations, easy paved walkways, and accessible viewpoints.
• Pikes Peak: Take the Pikes Peak Cog Railway for a scenic journey to the summit.
• Stay overnight in Colorado Springs

Day 3: Colorado Springs to Canon City

• Drive to Canon City (1 hour)
• Royal Gorge Bridge and Park: Walk or drive across one of the highest suspension bridges in the world, with panoramic views.
• Stay overnight in Canon City

Day 4: Canon City to Great Sand Dunes National Park

• Drive to Great Sand Dunes National Park (2.5 hours)
• Explore the dunes: The Medano Pass Primitive Road offers scenic drives. Limited walking on the dunes if possible.
• Stay overnight in Alamosa or near the park

Day 5: Great Sand Dunes National Park to Pagosa Springs

• Drive to Pagosa Springs (2 hours)
• Relax in the hot springs: Enjoy the therapeutic hot springs with beautiful mountain views.
• Stay overnight in Pagosa Springs

Day 6: Pagosa Springs to Durango

• Drive to Durango (1.5 hours)
• Durango & Silverton Narrow Gauge Railroad: Take a scenic train ride through the mountains (round trip).
• Stay overnight in Durango

Day 7: Durango to Ouray

• Drive to Ouray via the Million Dollar Highway (2 hours)
• Explore Ouray: Known as the "Switzerland of America," Ouray offers stunning mountain views and hot springs.
• Stay overnight in Ouray

Day 8: Ouray to Black Canyon of the Gunnison National Park

• Drive to Black Canyon of the Gunnison National Park (1.5 hours)
• Explore the park: Scenic drives along the South Rim with several accessible viewpoints.
• Stay overnight in Montrose

Day 9: Montrose to Aspen

• Drive to Aspen (3 hours)
• Explore Aspen: Take a leisurely drive up to Maroon Bells (one of the most photographed spots in Colorado).
• Stay overnight in Aspen

Day 10: Aspen to Rocky Mountain National Park

• Drive to Rocky Mountain National Park (3.5 hours)
• Explore the park: Take the Trail Ridge Road for stunning views with plenty of accessible stops along the way.
• Stay overnight in Estes Park

Day 11: Rocky Mountain National Park to Denver

• Drive back to Denver (1.5 hours)
• Optional stops: Take scenic detours if time allows.
• Stay overnight in Denver or catch a late flight home

Additional Tips:

• Accommodation: Book motels, Airbnbs, or Vrbo in advance, especially in popular tourist areas.
• Accessibility: Many national parks offer accessible facilities and viewpoints. Check the National Park Service website for specific accessibility information.
• Activities: Focus on scenic drives, accessible trails, and leisurely activities that don't require strenuous physical activity.