Silversword Loop is a 1 mile loop trail located near Kula, HI. The trail is primarily used for hiking.
Haleakala National Park PO Box 369 Makawao HI 96768 For general park information, call (808) 572-4400. Recorded message is available 24-hours a day and will likely contain an answer to your question. To speak to a park representative, call the same number and press 0 during office hours of 8:00 am - 3:45 pm HST. Kipahulu (Coastal Area) For information specific to the Kipahulu area of the park, call the Kipahulu Visitor Center at (808) 248-7375 during office hours of 9am-5pm HST.
while there are many silverswords visible from the loop, i found the plants visible from sliding sands trail to be more appealing. definitely worth traversing this loop if you're already in the crater though.