Good Sam Club Open Roads Forum: Roads and Routes: 16% Road incline!
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 > 16% Road incline!

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Yosemite Sam1

Under the pines.

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Posted: 06/14/21 12:14pm Link  |  Quote  |  Print  |  Notify Moderator

Granting it's only under 2 miles -- the long steep climbs are where the truck engine whines and becomes iffy[emoticon]

The dreaded Tioga Pass from Lee Vining to Toulomne, 120 Merced to Yosemite, I-80 to Donner Summit, I-5 Grapevine, I-15 Cajon Pass, Conway Summit in Highway 395... are, if I recall correctly, are just 6%.

Anything else out there steeper and more challenging?

2oldman

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Posted: 06/14/21 12:48pm Link  |  Quote  |  Print  |  Notify Moderator

Yosemite Sam1 wrote:

Anything else out there steeper and more challenging?
That's a bad one. Worst I've found was 18% - a residential street in Seattle, but in normal travels, no, I can't imagine 16%.

Lwiddis

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Posted: 06/14/21 01:12pm Link  |  Quote  |  Print  |  Notify Moderator

If you take the Old Priest route, yes. Otherwise 120 doesn't get to 16% or even close. RVs and trucks are not allowed on Old Priest.


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time2roll

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Posted: 06/14/21 01:32pm Link  |  Quote  |  Print  |  Notify Moderator

Try Nine mile canyon road off 395 at Pearsonville. Solid 10% for nine miles with a few 15 mph curves to break any momentum. The top part makes up some of the easier spots at the start. Ebbetts pass 24%, Sonora Pass 26%. 190 into the north end of DVNP is a sustained 9% so you can also test your cooling system in 120+ heat. You will know your limit when you are full throttle in low gear and losing speed into the TC slipping.


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Reader1

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Posted: 06/14/21 02:16pm Link  |  Quote  |  Print  |  Notify Moderator

Information please on 17?? My daughter son-in-law and grands will be driving from Arizona to Utah on 17 beginning very early Wednesday morning. Thanks in advance!!

Yosemite Sam1

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Posted: 06/14/21 02:58pm Link  |  Quote  |  Print  |  Notify Moderator

Lwiddis wrote:

If you take the Old Priest route, yes. Otherwise 120 doesn't get to 16% or even close. RVs and trucks are not allowed on Old Priest.


I always look at it whenever I use the 120 and wonder how bad it is to not allow trucks.

I would want to try it though someday with the RV hitch, lol.

Yosemite Sam1

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Posted: 06/14/21 03:03pm Link  |  Quote  |  Print  |  Notify Moderator

time2roll wrote:

Try Nine mile canyon road off 395 at Pearsonville. Solid 10% for nine miles with a few 15 mph curves to break any momentum. The top part makes up some of the easier spots at the start. Ebbetts pass 24%, Sonora Pass 26%. 190 into the north end of DVNP is a sustained 9% so you can also test your cooling system in 120+ heat. You will know your limit when you are full throttle in low gear and losing speed into the TC slipping.


You win! LOL

You must be the true Californian.

I thought I've already explored all the byways of California, including those where you are driving for an hour and never encountered a soul, but these ones are I'm very fortunate not to pass by.[emoticon]

So the 6% max grade are only for freeways?

vermilye

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Posted: 06/14/21 04:05pm Link  |  Quote  |  Print  |  Notify Moderator

PA 487 between Ricketts Glen State Park & Red Rock, PA includes a 2 mile 18% grade.
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time2roll

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Posted: 06/14/21 04:06pm Link  |  Quote  |  Print  |  Notify Moderator

6% is the general limit for interstates. I70 has some 7% up to the tunnel. Could be some others but not many.

When I was young I rode my bike up the east side of Sonora with a buddy. Scary was coming back down.

* This post was edited 06/14/21 04:32pm by time2roll *

paulj

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Posted: 06/14/21 04:32pm Link  |  Quote  |  Print  |  Notify Moderator

High Bar road descending into the Fraser Canyon, British Columbia, has 23% grade sign at the top.

https://xpedbc.com/2017/08/27/time-travel-in-the-cariboo/

Half way down I stopped for a breather. The front wheels (on my suv) were too hot to touch.

The Hill to Bella Coola is only 10-11%, but longer. I've seen a pickup camper with a brake fire at the bottom.

Rennell Sound road on Haida Gwaii has 24% grade at the bottom

http://britishcolumbia.com/plan-your-tri........rthern-bc-and-haida-gwaii/rennell-sound/

Long Canyon in Utah (near Dead Horse State Park, Moad) is a good for testing your brakes or low-range.

https://www.dangerousroads.org/north-ame........a/6502-long-canyon-road-pucker-pass.html

* This post was edited 06/14/21 04:46pm by paulj *

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