M-20 J (201) / Allegro
Flight Crew Private; Flight Crew Instrument
Flight Crew Last 90 Days 94; Flight Crew Total 3105; Flight Crew Type 2642
Situational Awareness
Ground Event / Encounter Ground Strike - Aircraft; Ground Excursion Runway; Inflight Event / Encounter Unstabilized Approach
Aircraft Aircraft Damaged
Human Factors; Airport
3W5 airport has a right hand pattern for Runway 7; which I chose to follow for the landing since I was heading west down the valley.  I entered the downwind at 1;200 ft. and noted that there was a hill at the end of the downwind that limited how far I could go before turning base; which shortened my normal downwind leg.  Turning base put me a little past the runway centerline; which I came back to on the approach.  There were trees that I had to clear before reaching the runway. Having cleared the trees I pushed the plane down to the runway.When I descended into ground effect the plane floated further than normal because of the increased airspeed from the descent. When it finally touched down I had to decide between trying to stop or doing a go around.  With trees at the opposite end of the runway I was not sure about missing them on a go around so I decided to try and stop on the runway and applied heavy breaking. I traveled off the end of the runway onto the dirt and grass which went downhill about twenty feet to a dirt road.  The plane slid down the incline and when it reached the road; the prop struck the dirt road scraping two of the blades and bending the third one.  A fellow came and helped me turn the plane on the road and we moved it up to the hangar area.  The prop has been removed and needs to be replaced; and the engine is scheduled for tear down and exam for any internal damage.In thinking back on the incident; I can see where having more information about the layout of the airport and the surrounding area would probably have had me land on Runway 25 since there was no wind on that day and the approach pattern to Runway 25 was more open.  I know my airspeed was a little faster than normal when I got to the runway but was surprised at how far the plane drifted before touchdown. When landing a Mooney; airspeed is critical.
Mooney pilot reported overshooting the touchdown zone with excess airspeed on landing; resulting in a runway excursion.