Near Kelowna, the Trepanier Bench Road is open to ATV riding.
To reach the trailhead from Highway 97C, use the Trepanier Bench Road exit. There is a parking area on the right near the exit.
There are many trails of varying difficulty criss-crossing through this area. You can also access a powerline road; the "truck" route that looks like it just criss-crosses the powerline road actually has branches and offshoots all along it, so do check it out. One of the branches is a twisty little trail that pops out on a bluff high above Hwy 97C, and offers a great view if the weather is clear. If you stick to the powerline road, it will take you under the Coquihalla Hwy and eventually past Brenda Mine.
Note: As of August 2008, the Ministry of Forests Regulations require all ATV drivers to be at least 16 years of age and have a valid drivers license to ride on Forest Service Roads. In addition, the ATV must have valid third-party liability insurance, which is typically around $120 per year. The Conservation Officers will issue a $600 ticket if you do not have proof of insurance.