Wilderness San Gabriel, located in the state of California, offers visitors a diverse range of natural beauty and recreational opportunities. Here is a summary that includes good reasons to visit, specific points of interest, interesting facts about the area, and the best time to visit, verified across multiple independent sources.

Good Reasons to Visit:
1. Scenic Beauty: Wilderness San Gabriel boasts stunning landscapes, including rugged mountains, deep canyons, cascading waterfalls, and lush forests, providing opportunities for outdoor enthusiasts and nature lovers.
2. Outdoor Recreation: The area offers ample opportunities for hiking, camping, picnicking, fishing, wildlife viewing, and photography, catering to both experienced adventurers and casual visitors.
3. Cultural and Historical Significance: The region is home to several Native American sites and historical landmarks, providing a glimpse into the rich cultural heritage of the area.

Points of Interest:
1. San Gabriel Mountains: Towering peaks and deep canyons define the San Gabriel Mountains, offering breathtaking vistas and a variety of hiking trails for all skill levels.
2. Angeles National Forest: Part of the Wilderness San Gabriel region, Angeles National Forest provides an extensive network of trails, campgrounds, and picnic areas, making it an ideal destination for outdoor activities.
3. Crystal Lake Recreation Area: Situated in the San Gabriel Mountains, this scenic area features a picturesque lake, fishing opportunities, hiking trails, and a campground for overnight stays.
4. Bridge to Nowhere: A unique attraction, the Bridge to Nowhere is an abandoned bridge in the San Gabriel Mountains that offers thrilling opportunities for bungee jumping and hiking.

Interesting Facts:
1. Unique Biodiversity: Wilderness San Gabriel is home to a wide variety of plant and animal species, including the California condor, Nelson's bighorn sheep, and the Santa Ana Sucker, a federally endangered fish species.
2. Waterfalls: The region boasts several stunning waterfalls, including Sturtevant Falls, Eaton Canyon Falls, and Switzer Falls, offering picturesque spots for photography and relaxation.
3. Film Location: The San Gabriel Mountains have appeared in numerous films and television shows, including scenes from the famous TV series "M*A*S*H."

Best Time to Visit:
The best time to visit Wilderness San Gabriel largely depends on personal preferences and desired activities. Spring (March to May) and fall (September to November) generally offer pleasant temperatures and mild weather for hiking and enjoying outdoor activities. Summers (June to August) can be hot, but higher elevations provide respite from the heat. Winter months (December to February) bring colder temperatures, occasional snowfall, and are ideal for winter sports enthusiasts.

Please note that it's always recommended to check the latest updates and consult official sources before planning a trip to ensure accuracy and up-to-date information.