Reddit mentions of The Creaky Knees Guide Oregon, 2nd Edition: The 85 Best Easy Hikes

This maybe a great book to get your parents. I have rheumatoid arthritis and am a hiker/backpacker and love these books. Get them out there! I like the latourell falls suggestion and horsetail falls to ponytail falls. I actually find horsetail to ponytail easier on my joints. I also never hike without trekking poles because of the risk of a joint giving out on me. Even taking the drive on the historic Columbia hwy and stopping at the falls to view them then doing the small hikes into them would be great. Like latourell walk to the bottom instead of the higher falls, bridal veil is another short one, to the bridge at multnomah. This is an easy way to introduce them to hiking with breaks in between. Have fun and I hope they love it.

https://www.amazon.com/gp/aw/d/B0104FJIOE/ref=mp_s_a_1_51?ie=UTF8&qid=1487397212&sr=8-51&pi=AC_SX236_SY340_QL65&keywords=hiking+book+oregon