Impressive Shockwave Racing Game

Way back in 2006,I remember being very impressed by the graphics of an online racing game I had played which I believe had used the Macromedia Shockwave player(might be remembering this wrong tho,might have been just plain old Flash. My memory is fuzzy on this). It had fully rendered 3D graphics with textures and everything. Another thing that really impressed me was the length of the track,the track seemed huge,almost neverending. I think it took about 15-20mins just to finish the track,though that might not be correct,it might have felt like it took longer than it actually did haha. The track seemed to mostly pass through a forest,occasionally also passing by some houses and more urban areas. Everything looked great,the background was full of 3D rendered objects with nice textures,I remember the many pine trees you'd pass by looking really good,and also the houses had some really nice textures. I remember you would race a red sports car,and there may have been an option to change the car/colour,but I don't remember seeing one,which is strange. Also,I'm pretty sure that that one really long track was the only track in the game,and once you completed it that was it,you won the game. Thinking about these things,it almost feels like this was some kind of tech demo,what with how there was only 1 track and no apparent option to change your car. Well,if it was a tech demo,it sure wasn't presented as one,because I remember finding it on a normal online game site,just like any other game. Also,keep in mind that this was impressive to me by 2006 web game standards,I don't know if it would be as impressive by today's standards haha.