Bon Tempe Lake, Alpine Lake & Cataract Trail loop

The terrain is quite varied. Around Bon Tempe Lake, you'll find a mix of gravel and some paved sections, with gentle ups and downs. The Cataract Trail Waterfalls section, however, is a single-track path with steep climbs, steps, switchbacks, and rocky areas, including exposed roots and short scrambles. Other parts, like the Helen Markt Trail, contour gently, while the Kent Trail offers a smooth forest path.

This loop offers several stunning highlights. You'll pass by the serene Bon Tempe Lake & Dam, the picturesque Alpine Lake, and the captivating Cataract Trail Waterfalls, a series of cascades through a lush redwood gully. You'll also see the Lake Lagunitas Dam and the Lake Lagunitas Picnic Area and Trailhead.

Spring and early summer are excellent for seeing wildflowers, while autumn offers beautiful foliage, especially from the bigleaf maples. The Cataract Trail Waterfalls are particularly impressive after rainfall, making late winter and spring a great time to experience the cascades at their fullest. However, the trail can be enjoyed year-round, with varied scenery each season.

Yes, a parking fee is typically required to access the Mt. Tamalpais Watershed. There are no specific hiking permits needed for the trails themselves, but always check the official Marin Municipal Water District (MMWD) website for the latest regulations and fee information before your visit.

You can typically find parking near Bon Tempe Lake or Lake Lagunitas, which serve as common trailheads for this loop. Be aware that a parking fee is usually required to enter the Mt. Tamalpais Watershed area.

Regulations regarding dogs in the Mt. Tamalpais Watershed can vary. It's best to check the official Marin Municipal Water District (MMWD) website or signage at the trailhead for current rules on whether dogs are allowed and if they must be on a leash.

Yes, this loop utilizes sections of several other trails within the watershed. You'll jog along parts of the Collier Trail, Cataract Trail, Lower Northside Trail, CC Boys Trail, Northside Trail, Benstein Trail, Lower Berry Trail, Simmons Trail, Lagunitas Fire Trail, Collier Spring Trail, International Trail, Kent Trail, Helen Markt Trail, Shady Side Trail, Laurel Dell Fire Road, Kent Fire Road, Mickey O`Brien Trail, Bon Tempe Dam Road, Lagunitas Rock Spring Road, Rocky Ridge Fire Road, High Marsh Trail, Simmons Fire Road, Lakeview Fire Road, Azealea Meadow Trail, Pine Point Trail, Lagoon Fire Road, Bare Knoll Trail, Music Stand Trail, Alex Forman Trail (formerly Sky Oaks), Bullfrog Fire Road, and Sunny Side Trail.

The diverse landscape supports a variety of life. Around the lakes, you might spot cormorants and herons. The Cataract Trail Waterfalls section is particularly rich in forest vegetation, including California bay, tanoak, bigleaf maple, redwood, and Douglas fir, with ferns in the understory. Wildflowers are abundant in spring and early summer.

Yes, while the full loop is considered difficult, the section around Bon Tempe Lake alone is much easier. It covers about 3.7 to 4.1 miles with only around 200 feet of elevation gain, making it a moderate and enjoyable run without the steep climbs of the Cataract Trail Waterfalls.

The Lake Lagunitas Picnic Area and Trailhead offers some facilities. For cafes, pubs, or more extensive amenities, you would typically need to drive a short distance to nearby towns outside the immediate watershed area.

Given the trail's difficulty and length, bring plenty of water, especially on warmer days. Sturdy jogging shoes with good grip are essential for the varied and sometimes rocky terrain. Sun protection, snacks, and a map or GPS device are also highly recommended.