Muir Woods National Monument is one of the great natural cathedrals of California, a hushed grove of ancient coast redwoods tucked into a fog-cooled canyon just 12 miles north of the Golden Gate Bridge near Mill Valley. Part of the Golden Gate National Recreation Area, its 554 acres protect 295 acres of old-growth redwood forest, where wooden footpaths wind between towering trees, many of them 600 to 800 years old and soaring up to 250 feet, along the banks of Redwood Creek. It is a genuinely awe-inspiring place, and one of the most beloved parks in the Bay Area.

The forest is the whole experience. Walking beneath these giants, in the cool green light filtering through the canopy with the creek murmuring alongside, is unlike anywhere else so close to a major city. The park offers about six miles of trails, from easy half-hour loops to more challenging routes that climb out of the canyon and connect with Mount Tamalpais State Park. The Main Trail is paved and wheelchair-accessible for its first mile, running level alongside Redwood Creek, which makes the heart of the grove reachable for just about any age or ability.

The single most important thing to know before visiting is that reservations are required. Because parking and the shuttle are limited and the park is enormously popular, you must reserve a parking spot or a shuttle seat in advance; you cannot simply drive up and get in. There is also an entrance fee (children are free), a standard national-park charge. Booking ahead through the official reservation system is non-negotiable, and it's the difference between a magical morning and being turned away at the road.

Muir Woods is open 365 days a year and opens at 8 a.m., and the early birds are rewarded: the first hours bring the best light for photos, the quietest trails, and the classic redwood-forest fog before the crowds arrive. It gets genuinely busy by midday, so an early reservation is the move.

The coastal climate means it's cool and often damp year-round, even when the rest of the Bay Area is warm, so layers and a rain shell are wise in any season. The paved main loop is stroller- and wheelchair-friendly; the connecting trails into the hills are steeper and rougher.

Come with warm layers, comfortable shoes, a camera, and, above all, a reservation made in advance. For a walk among 800-year-old giants in a fog-wrapped canyon minutes from San Francisco, Muir Woods is a bucket-list experience that fully earns its fame.

This HIKERS ONLY loop trail is about 8 miles, with a 700 ft elevation gain. People often only hike the Little Wild Horse part, which is a 3.3 mile one way section of the trail. It's a relatively easy trail, for all ages. The LIttle Wild Horse trail is a slot canyon set in the red rock sandstone of Southern Utah and winds its way through the San Rafael Swell. Its twisty and turny and beautiful. The Bell canyon section is actually the easier trail, but not nearly as interesting. Crowds and rain can be a problem, so be respectful and watch the weather. Rain and snow runoff are very dangerous in slot canyons. 

Be aware that during the wet season water can pool, so be prepared to maybe get a little wet. 

Terraced Falls is a hidden gem in Yellowstone's remote Cascade Corner — the wild, waterfall-rich southwest region of the park — where the Fall River plunges more than 150 feet through a dramatic series of six rocky “terraces” into a deep canyon. Far from the crowded boardwalks of the park's interior, this quiet trail rewards hikers with one spectacular cascade after another in a peaceful forest setting.

The hike is a delight, and surprisingly easy for the scenery it delivers: about 4 miles round trip, following beautiful Cascade Creek and then the Fall River as they tumble through a string of frothy waterfalls (none huge on their own, but each lovely) on the way to the grand finale at Terraced Falls. The trail ambles gently through the forest, never far from the sound of rushing water.

Getting there is part of the adventure, since Cascade Corner is reached not through the park's main entrances but via Grassy Lake Road from the Flagg Ranch area near the south entrance. Plan to drive roughly 10–11 miles on a gravel national-forest road (most passenger cars can manage it slowly) to the Cascade Canyon trailhead. Note the road may be closed early in the season due to high water, so it's best from summer into fall.

This is true Yellowstone backcountry: carry bear spray and be bear aware, bring plenty of water, stay back from the slippery canyon rims and powerful water, and pack out everything. There are no services out here, so come self-sufficient. For hikers willing to venture to Yellowstone's quiet corner, Terraced Falls offers a string of stunning waterfalls and a kind of solitude that's hard to find anywhere else in the park.