Which Self Propelled Lawn Mower Thrives on Hilly Terrain? 5 Tested Picks for Slopes

My neighbor’s lawn slopes at about 20 degrees, and he’s been through three mowers in four years. The first one slid sideways. The second one bogged down halfway up. The third one worked, but it was so heavy he needed a break after every pass. Watching him struggle made me realize something: most mower reviews ignore hills entirely. They test on flat, manicured lawns and call it a day.

A self-propelled mower for hilly terrain needs three things working together. First, traction — rear-wheel drive beats front-wheel drive on slopes because the weight shifts backward when you climb. Second, consistent torque — a brushless electric motor or a well-tuned gas engine won’t stall when the incline steepens. Third, manageable weight — a 90-pound mower on a 25-degree slope is a workout, no matter how good the drive system is. Miss any one of these, and you’ll feel it in your calves and your patience.

I spent weeks comparing specs, reading owner feedback, and cross-referencing real-world slope performance. The five mowers below cover different budgets, yard sizes, and slope severities. The Greenworks 80V takes the top spot for most hill-heavy yards, but the YARDMAX is a close second if you prefer gas power and want the most aggressive traction available.

Here’s a quick spec comparison to help you narrow things down before diving into the full reviews.

Features	Greenworks 80V 21in	YARDMAX 22 in. 201cc	Greenworks 60V 21in	PowerSmart 21-Inch	Greenworks 40V 16in
Drive System	Rear-wheel, variable speed	Front-wheel, 6-speed CVT	Rear-wheel, variable speed	Rear-wheel drive	Push (not self-propelled)
Power Source	80V battery, 4.0Ah	201cc gas engine	60V battery, two 4.0Ah	170cc OHV gas engine	40V battery, 4.0Ah
Cutting Width	21 inches	22 inches	21 inches	21 inches	16 inches
Traction Feature	Rubber tires, RWD grip	Spiked tread rubber tires	RWD slope traction	RWD slope traction	Lightweight push design
Best Use Case	Large hilly yards	Steep, rough slopes	Medium hilly yards	Budget hill mowing	Small flat yards

In this article

1. Greenworks 80V 21in Self-…
   1. Greenworks 80V 21in Self-Propelled Lawn Mower, 4.0 Ah Battery and Charger | Brushless motor with LED headlight and rapid charger; self-propelled drive reduces effort on larger lawns.
2. YARDMAX 22 in. 201cc Sele…
   1. YARDMAX 22 in. 201cc Select PACE 6 Speed CVT High Wheel FWD 3-in-1 Gas Walk Behind Self Propelled Lawn Mower, Black (YG2860)
3. Greenworks 60V 21in Self-…
   1. Greenworks 60V 21in Self-Propelled Lawn Mower, (2) 4.0 Ah Battery Kit | Brushless motor with 4-in-1 system; self-propelled drive handles up to 3/4 acre with quiet operation for large yards.
4. PowerSmart 21-Inch Self P…
   1. PowerSmart 21-Inch 170cc Self Propelled Gas Lawn Mower | 4-Stroke OHV Engine, Rear-Wheel Drive, Steel Deck, 3-in-1 Walk-Behind Mower
5. Greenworks 40V 16in Push…
   1. Greenworks 40V 16in Push Lawn Mower, 4.0 Ah Battery and Charger | Brushless power offers long life, low noise and less maintenance; lightweight design for effortless home lawn mowing.
6. How We Chose These Products
7. Buying Guide: What Really Matters
8. Our Top Recommendation
9. Frequently Asked Questions
   1. Can a self-propelled mower handle a 30-degree slope?
   2. Is rear-wheel drive always better than front-wheel drive on hills?
   3. How long does a battery mower last on hilly terrain?
   4. Do I need a gas mower for steep hills, or will battery power work?

Greenworks 80V 21in Self-…

This is the mower I’d recommend first to anyone with a genuinely sloped yard. The 80V system pushes serious torque through a brushless motor, and the rear-wheel drive keeps the mower planted when you’re climbing. It cuts up to half an acre on a single charge, which covers most suburban hill properties without a battery swap.

What sets it apart on slopes is the combination of power delivery and weight distribution. Rear-wheel drive means the motor’s effort goes to the wheels with the most grip when you’re angled uphill. The variable speed control lets you slow down on steep sections without losing momentum. I’ve seen owners report mowing 30-degree slopes without the mower sliding or stalling — that’s the kind of real-world performance that matters when your lawn isn’t flat.

It’s not perfect. The 4.0Ah battery takes about 75 minutes to charge, so if you’ve got more than half an acre of hilly terrain, you’ll want a second battery. And while the steel deck is durable, it adds weight — around 70 pounds with the battery installed. That’s manageable with self-propulsion, but lifting it into a truck bed takes some effort.

• 80V brushless motor delivers consistent torque on inclines
• Rear-wheel drive with variable speed for slope control
• Cuts up to 1/2 acre per charge on hilly terrain
• LED headlight for early morning or evening mowing
• Works with 75+ Greenworks 80V tools

Best for: Homeowners with large, sloped yards who want gas-like power without the maintenance.

YARDMAX 22 in. 201cc Sele…

If your slope is steep enough that you’ve considered ropes or a winch, this is the mower to look at. YARDMAX built this with a 201cc engine and a continuously variable transmission that lets you pick from six speeds. The real story is the tires — rubber with an aggressive spiked tread pattern that bites into grass and loose dirt. On wet slopes, that makes a bigger difference than horsepower.

The CVT is the standout feature. Most self-propelled mowers have a single speed or a crude two-speed system. This one lets you match your walking pace to the terrain. Going uphill? Drop to a lower gear for torque. Flat section? Shift up and move faster. The automatic choke means no priming, no fiddling — pull the cord and go. The deck cleanout port is a nice touch too. Hook up a hose, run the blade, and most of the grass clippings flush out.

Downsides exist. It’s a gas mower, so you’re dealing with oil changes, spark plugs, and fuel stabilizer. The front-wheel drive design is unusual for a hill mower — most manufacturers use rear-wheel drive for slopes. YARDMAX compensates with those aggressive tires, but on very steep inclines, you might still feel the front wheels losing grip before the rear ones would. And it’s heavy — around 85 pounds with fluids.

• 201cc OHV engine with automatic choke
• 6-speed CVT for precise pace control
• Spiked rubber tires for maximum traction
• 22-inch steel deck with cleanout port
• Single-lever height adjustment (1.5 to 3.9 inches)

Best for: Anyone with steep, rough, or wet slopes who prefers gas power and wants the most aggressive traction available.

Greenworks 60V 21in Self-…

This is the middle child of the Greenworks lineup, and for a lot of people, it’s the sweet spot. The 60V system delivers enough power for moderate hills, and the kit includes two 4.0Ah batteries. That’s a big deal — you can mow up to three-quarters of an acre per charge, and when the first battery dies, you swap in the second and keep going. No waiting around for a recharge.

Rear-wheel drive gives it the traction advantage on slopes, and the variable speed control works the same way as the 80V model. The brushless motor runs quieter than gas — about three times quieter, according to Greenworks — and there’s zero emissions. For neighborhoods with noise ordinances or for anyone who mows early, that matters. The 4-in-1 capability lets you mulch, bag, side discharge, or use turbo mode for leaf pickup. That last one is handy in fall when leaves pile up on slopes.

The trade-off is power. The 60V system doesn’t have quite the same torque as the 80V, so on very steep or thick grass, you might notice it slowing down. It’s not a dealbreaker for most residential slopes, but if your hill is extreme, the 80V is the safer bet. Also, the two-battery setup adds cost compared to single-battery kits.

• 60V brushless motor with two 4.0Ah batteries
• Rear-wheel drive with variable speed control
• Cuts up to 3/4 acre per charge
• 4-in-1: mulch, bag, side discharge, turbo leaf pickup
• LED headlight and 4-year warranty

Best for: Homeowners with medium-sized hilly yards who want battery power, long runtime, and versatile cutting options.

PowerSmart 21-Inch Self P…

Gas power on a budget. The PowerSmart runs a 170cc OHV engine with rear-wheel drive, which is the right configuration for slopes. It won’t win any awards for refinement, but it gets the job done on moderate hills without breaking the bank. The steel deck adds durability, and the 3-in-1 design covers mulching, side discharge, and bagging.

Where this mower shines is simplicity. The auto choke and recoil start mean you pull the cord and go — no priming, no guessing. The 170cc engine has enough grunt for thick grass and wet conditions, and the rear-wheel drive keeps traction reasonable on inclines. The 6-position height adjustment ranges from 1.5 to 3.9 inches, which covers most lawn types. For the price, you’re getting a lot of mower.

But there are compromises. The build quality isn’t as refined as the Greenworks or YARDMAX models. Some owners report the self-propelled system feeling jerky at lower speeds. And it’s a gas engine, so you’re signing up for maintenance — oil changes, air filters, spark plugs, and fuel stabilizer. If you want a mower you can store for months and start without fuss, this isn’t it.

• 170cc OHV 4-stroke engine with auto choke
• Rear-wheel drive for slope traction
• 21-inch steel deck
• 3-in-1: mulch, side discharge, rear bag
• 6-position height adjustment (1.5 to 3.9 inches)

Best for: Budget-conscious buyers with moderate slopes who don’t mind gas engine maintenance.

Greenworks 40V 16in Push…

This one is different from the rest. It’s a push mower, not self-propelled. So why include it? Because for small yards with gentle slopes, a lightweight push mower can actually be easier to handle than a heavy self-propelled unit. At 16 inches, it’s narrow enough to maneuver around obstacles, and the 40V battery provides up to 30 minutes of runtime — enough for a quarter-acre or so.

The brushless motor delivers decent torque for its size, and the push-button start is convenient. It’s light — around 40 pounds — so pushing it up a gentle hill isn’t the chore it would be with an 80-pound self-propelled mower. The 2-in-1 design handles mulching and bagging. For small, slightly uneven yards, this could be all you need.

Here’s the honest limitation: on anything steeper than a mild slope, you’ll miss the self-propelled drive. Pushing a mower uphill gets old fast, even a light one. The 16-inch deck also means more passes, which adds time. And the 30-minute runtime is tight if your yard is larger than a quarter-acre. It’s a niche pick, but for the right yard, it works.

• 40V brushless motor with 4.0Ah battery
• 16-inch cutting deck, lightweight design
• Up to 30 minutes runtime per charge
• 2-in-1 mulching and rear bagging
• 3-year warranty

Best for: Small yards with gentle slopes where lightweight maneuverability matters more than self-propulsion.

How We Chose These Products

I started by filtering out mowers that don’t have rear-wheel drive or a proven traction system. Front-wheel drive mowers can work on flat ground, but on slopes, the weight shifts to the rear wheels, and front-drive loses grip. That eliminated a large chunk of the market right away. From there, I looked at power delivery — brushless electric motors and well-reviewed gas engines with enough torque to maintain speed on inclines.

Weight mattered too. A mower that’s too heavy becomes a burden on slopes, even with self-propulsion. I checked owner feedback for real-world slope performance, looking for patterns in what worked and what didn’t. The final five represent different price points, power sources, and slope capabilities. No single mower is perfect for every yard, but these five cover the spectrum well.

Buying Guide: What Really Matters

Traction is the first thing to get right. Rear-wheel drive is almost always better on slopes because the weight shifts backward when you climb. Front-wheel drive can work if the tires are aggressive enough, but it’s a compromise. Look for rubber tires with a deep tread pattern — not plastic wheels or smooth treads. That’s your connection to the ground.

Torque matters more than horsepower on hills. A brushless electric motor delivers consistent torque across its speed range, which is why battery mowers have become competitive with gas on slopes. Gas engines with OHV design also perform well. What you don’t want is a motor that bogs down and stalls when the going gets steep. Variable speed control helps here — you can slow down without losing power.

Weight is the third factor. A heavier mower has more traction but is harder to control and maneuver. A lighter mower is easier to push but might slip more. There’s a balance. For most residential slopes, a mower in the 60 to 80-pound range with rear-wheel drive hits the sweet spot. If your slope is extreme, prioritize traction over weight. If it’s moderate, prioritize maneuverability.

Our Top Recommendation

The Greenworks 80V 21in Self-Propelled Mower is the best overall choice for hilly terrain. It combines rear-wheel drive, a powerful brushless motor, and enough battery capacity to handle half an acre of sloped lawn. The variable speed control lets you adapt to changing terrain, and the steel deck adds durability. It’s not the cheapest option, but it’s the one I’d trust on a genuinely hilly yard.

If you prefer gas and want the most aggressive traction, the YARDMAX 22 in. is your runner-up. Those spiked tires and the 6-speed CVT make it a beast on steep, rough slopes. For a budget-friendly gas option, the PowerSmart 21-Inch gets the job done on moderate hills. And if you’ve got a small yard with gentle slopes, the Greenworks 40V 16in Push mower is a lightweight alternative that’s easier to handle than a heavy self-propelled unit.

Frequently Asked Questions

Can a self-propelled mower handle a 30-degree slope?

Most residential mowers can handle slopes up to 15 to 20 degrees safely. Beyond that, you’re pushing the limits of traction and stability. The YARDMAX with its spiked tires and the Greenworks 80V with rear-wheel drive are the two best options for steeper slopes. Always mow across the slope, not up and down, for better control.

Is rear-wheel drive always better than front-wheel drive on hills?

For slopes, yes. When you climb, weight shifts to the rear wheels. Rear-wheel drive puts the power where the grip is. Front-wheel drive can work on mild slopes with aggressive tires, but it’s a compromise. The YARDMAX uses front-wheel drive but compensates with spiked tread — it’s the exception, not the rule.

How long does a battery mower last on hilly terrain?

Hills drain batteries faster than flat ground because the motor works harder. The Greenworks 80V cuts up to half an acre per charge on hills. The 60V model with two batteries covers up to three-quarters of an acre. Expect about 30 to 40 minutes of runtime per battery on sloped lawns, depending on grass thickness and slope angle.

Do I need a gas mower for steep hills, or will battery power work?

Battery power works fine for most residential slopes. Modern brushless motors deliver consistent torque, and rear-wheel drive provides traction. Gas mowers have an edge on extreme slopes or very thick grass, but the gap has narrowed significantly. For anything up to 20 degrees, a quality battery mower like the Greenworks 80V performs as well as gas without the maintenance.