Hi guys, I have a somewhat specific set of needs for a family trip I'd like to plan for late summer. I grew up backpacking with my parents, but in the last 10 years my mother's knees have started to go. She's had surgery on one and is in good shape right now, but long ascents and descents are hard on her and result in a terrible night's sleep. We have a tradition now of doing one family backpacking trip each year that is low impact so that everyone can come.
Last year, we did Third Beach to Hoh River on the Pacific Coast in Olympic National Park. That trail is roughly 20 miles, and save for two or three headlands that require a very short up-and-over, the trail is basically walking along the beach. My mom enjoyed this trip immensely. It was the first trip in a few years where she wasn't in any pain at all. We took 5 days to do the hike, with one no-hike day for relaxing on the beach, so we were going at a leisurely 5mi-per-day pace.
She's in even better shape this year (her knee and overall), but has requested another hike that won't test her knees. I've been thinking about doing a strip of the Lost Coast in northern California?
Does anyone have any ideas? We'd be willing to go anywhere in WA, OR, CA, and maybe western NV or AZ for the right hike, it doesn't need to be coastal, but those trails are often pretty flat, obviously.