I've not seen this used myself but if you have an Ambutech cane they have their Dakota Disk -

> This hook style tip is designed to travel over uneven surfaces such as snow, sand, grass, pea gravel (school yards) and many more.

https://ambutech.com/shop-online/dakota-disk

There are Youtube videos about it

$1

> This all terrain cane tip was designed in North Dakota by Paul Olson (COMS) and produced by Ambutech.

$1

> Here is a review of the second of four "off road" capable tips from Ambutech, their Dakota Disk. This is by far the most different cane tip that I've tried, and discuss its pros and cons during the review.

I used my NFB’s cane and a hiking pole to do hiking in a rocky area. It went well, I think that I’ll try using two poles the next time. Keep in mind that having good shoes for hiking will help quite a bit too.

My partner and I are reading this (he is legally blind). We backpack and hike often, and he actually switched from using his cane to trekking poles and signs that help him both with stability and sensation. He asked me to let you know that it makes him feel much safer, and much more stable even in really rough terrain with the two poles.

I use this one:
Ambutech Rolling Ball Tip- Slip-On Style -Red https://www.amazon.com/dp/B007SV7YNK/ref=cm_sw_r_cp_apa_i_z.b.Cb4BBS9JQ
I have taken it on hikes just fine; but it does add weight to the cane, and I had to adjust to that, and switch hands/arms in the meantime.

I've never had a client use a dakota disk before, but I have heard they are suppose to be good outdoors.

There is also a wheel tip.

https://ambutech.com/shop-online/rover-free-wheeling-hook-tip

They are good for terrain that isn't flat, but it will still get caught if the gaps are large enough.

I haven't used it, but I've heard that the dakota disc tip is good for the outdoors

$1