Lightest Weight Timepiece with an Alarm

I guess this will not answer your question, but I find it helpful to have a watch for various reasons, so I wear a G-shock 5600. I imagine that it’s one or two ounces, but it’s not significant to me on my wrist.

Timex Ironman? The smaller version that sells for around $30-40. Alarm and timer. I use the timer for cooking in case I get distracted doing other camp chores. I’m sure you could get something really tiny but then working the controls or seeing the time would be inconvenient

Depending on your age and associated high frequency hearing loss you might not be able to hear the subtle high pitch of a basic small watch.

“Try before you buy.”

even when I was younger the alarms in watches are only good at waking me up if I’m in the process of waking up anyway

Alarm on phone will work even in airplane mode.  My phone in airplane mode, even using it to take photos and shoot videos will last a solid 2 or 3 days before it needs a charge.

^^^

In OP –

“I have a cell phone but I will not have enough power to keep it on all the time. “

Some watches are really frustrating to program.

I find this light weight watch is easy to use:

There are different colors

The alarm is loud enough for me

@Greg. Thanks for pointing that out.. About OP. I saw that.. But figured I would throw it out there. Some people don’t realize their alarm will still work while in Airplane mode. And like I said.. My phone lasts up to 3 days without shutting it off and I use it to take many pictures and LOTS of videos.. In airplane mode. Alas.. The OP did not state the length or duration of said trips… So throwing it out there just in case…

Casio W800H-1AV. $20  Mine weighs 36 grams with band.

OK, this is not a serious suggestion, but since this thread is overlapping with my other hobby, this is my favorite alarm watch. It has been waking people up for nearly 60 years, and no batteries required.  ;-)

You didn’t say loudest alarm. This might be the lightest. 20.7 grams with the strap.

Casio Men’s Classic Quartz Watch with Resin Strap, Black (Model: F-91WM-1BCF) https://www.amazon.com/dp/B07C9F8XLL/ref=cm_sw_r_cp_api_i_vjjLFbCTPDZ63?_encoding=UTF8&psc=1