Author Topic: Passable: Biking along I-8 in southern CA and AZ?  (Read 1210 times)

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Offline BikeFreak

Passable: Biking along I-8 in southern CA and AZ?
« on: May 25, 2017, 03:32:26 am »

I am looking for an alternate route between San Diego, CA and Phoenix, AZ, than that proposed by Adventure Cycling. I have been googling a lot of info on the I-8 going in the southern part of CA and AZ. So far I have the following information:

1. There are many paved frontage roads and also the old Highway 80 so basically you only need to stay on the I-8 for small sections.
2. It seems that you can bicycle on the I-8 everywhere in AZ. When using google maps satellite I cannot see any "cyclists prohibited" on the signs entering the ramps.
3. It seems that you cannot bicycle on the I-8 everywhere in CA. When using google maps satellite I see "cyclists prohibited" on the signs entering all the ramps. There seems to be 1 exeption: The small stretch from Jacumba Hotsprings to Ocotillo is used by Adventure cycling and it does not have the signs on the interstate ramps.

There is only 1 single problematic stretch of 8.7 miles between in the easternmost part in CA just before Yuma:,-114.9573326/32.7630676,-114.8367779/@32.735414,-114.9332959,15157m/am=t/data=!3m2!1e3!4b1 On this stretch there is a slight chance of passing on some dusty sand roads but you need to cross the river 2 times and that is only possible on the I-8 itself - unless you swim across. Furthermore I am not sure how happy US border control is when you try to force your way across only feets away from the border.


There is an option to bypass that strech by entering Mexico at the Calexico/Mexicali border, stay on paved roads in Mexico for about 50 miles and then enter US again just west of Yuma. It would look something like this:,-115.3791608/32.7430173,-114.7170467/@32.6786304,-115.1936543,11z/am=t/data=!3m1!4b1!4m9!4m8!1m5!3m4!1m2!1d-115.0412616!2d32.6146707!3s0x80d70775997b5077:0x37b78882e93bc65f!1m0!3e0

Can anyone comment on this route suggestion?


Offline JHamelman

Re: Passable: Biking along I-8 in southern CA and AZ?
« Reply #1 on: May 25, 2017, 08:13:52 am »
Be aware there is construction occurring on I-8 this summer. See their site for more info on detours and shuttles for cyclists:


Jennifer Hamelman
Assistant Director, Routes & Mapping

Adventure Cycling Association
Inspiring and empowering people to travel by bicycle.
800/755-2453, 406/721-1776 x205

Follow Routes & Mapping on Twitter: @acaroutes