Great trip to the falls. Made a stop at the resort thinking that was the trail head area for the falls, you can however get to the falls from there, though there is this nice parking lot at the trail head. The road is paved all the way to the trail head which is pleasant. Hiked with four kids ages from 3-12. This was our third hike of the day after 5 miles before this one and it went well. There are things all ages can find adventureous here. We passed lots of people, all age ranges, going to and coming from the falls. 

My group of 5 hiked this Friday around 1:30 PM. You go past the Sol Duc Hot Springs and Campground and will find a good sized parking lot at the end of the road. 

There are put toilets and picnic tables at the trailhead/parking lot. 

When we got there, the parking was not full and there was plenty of parking. It took less than 30 minutes to get to the falls and was a relatively flat hike in to it. 

The falls are beautiful! Definitely an easy family friendly hike! 

My partner and I did an extended weekend trip to the coast. It was an amazing 3 days. We left the Edmonds ferry at 8 am. Arrived at Sol Duc falls did the short 1.6 round trip to the falls and back. Super easy, wet, but doable for all ages. 
We left Sol Duc and went to Mora where we would camp for two nights. Sunday afternoon turned into a GORGEOUS day. Sun out, blue skies, laid out on the beach, a sea otter came up and said hi, couldn't have asked for a better day. 

Saturday morning we got up early and went to Hole in a wall for low tide so we could tide pool a bit. WOW was that fun. We were the only ones there and the first ones out that morning. (NOTE*** there is a stream crossing that is a bit challenging half way there. During low tide you can walk closer to the ocean and it will be okay. if not expect to get your feet wet here. Still doable but you'll get some wet feet.) Saw some amazing sea anemones, star fish, crabs, a bald eagle, and so much more. It was really amazing morning. 
That afternoon things turned for the worst. It rained, and rained, and rained, and rained. We were able to set up camp during a dry spill that lasted for a few hours but Monday night was wet. 

Tuesday morning we got up, packed up camp and headed to third beach. The trail was amazing, wet, dense, serene, the whole package. (NOTE*** the trail was VERY muddy and at the last few hundred yards you'll have to climb down a muddy washed out part that requires you to hold onto a rope and climb down and climb up on the way back. It's NOT that hard but with kids, bags, equipment it can be challenging. We got to the beach for low tide and again first ones out and not a person on the beach. A wonderful morning of sun and clouds. 

Overall an amazing weekend getaway. The only thing I'll say is please pick up any trash you see on the beach, bring a bag and even some gloves if you want. I picked up all sorts of garbage on both beach hikes. We have to do everything we can to protect out lands. 

Hope this helps!