What's in your pack?

[Sombeech]

hydration (usually a Polar Ice gel water bladder)
slime - a MUST
pump
multi tool
patch kit (if other riders don't have slime)
spare tube (I use Schrader)
tire sticks
small first aid kit
camera/film stuff
cleaning rag
gloves
bogley cards

personals, like keys, phone, wallet

[live2ride]

I ride with pretty much the same and it depends on the ride but I usually have.

Spare tube, or two
pack kit
pump
chapstick
first aid kit
emergency blanket
whistle
GUN
powerbar
GU
tire sleeves for a ripped sidewall
spare screw for clipless pedals.
master quick link
multi tool / allen wrenches etc.

Nothing too heavy and pretty much the essentials, of course it depends on the ride and the forecasted weather but this is the basics.

[TreeHugger]

GUN? Are you serious? (remind me to avoid group rides with you!! yikes!)

Stuff seems pretty standard. I do carry I.D and insurance info, and now always a small first aid kit and bandanna (after a bad crash with some bad gashes and no first aid).

[tallsteve]

I'm pretty minimalist. For Wasatch Front riding I use my lower profile Camelbak with:

2 Allen wrenches
2 zip ties
1 Genuine Innovations Micro Inflator
2 CO2 cartridges
1 rear derailleur hanger
2 patches with 1 tube of super glue
A few bandages and alcohol wipes in a baggie
A couple of GU packs or similar

Sometimes I'll carry my pocket saw or hand pruners or limb saw (but only one of these at a time) if I know of spots on my trail adoptions that need some TLC.

If I'm riding Moab or St. George I'll usually pack a few more items.

[REDFOX]

Spare tube
alien multi tool
spoke wrench
allen keys
power bars
a few bandaids
zip ties
a small strap
metal tire levers
misc bolts for my frame
pump
tire patch kit
chain breaker tool
pedal wrench
lighter
gun

The gun thing is usually just for when I ride alone. Although it was bought specifically to be carried in my camelbak.
The funny thing is that I carry nothing in my vehicals. Maybe I am just relying on Onstar if there is ever an emergency.

[blueeyes]

I don't think carrying a gun is a bad thing. But then I am use to hiking with my Dad and he carries his handgun hiking or riding horse. He told me in case he comes across a pissed off badger. Granted my Dad is an odd one but very loveable.

Only thing I would be worried about is crashing with that thing in your pack, but I guess if the safety is on.

After coming across a moose on the trail at Snowbasin two years ago, I was very nervous finishing that ride, not by the moose he moved along, but we do have mtn lions. Maybe not at Snowbasin, but other places I ride I know they are there. I came to the conclusion if I must die mtn biking by being attacked by an animal then my number is up. However with my track record it is more likely to occur because I crashed.

Anyhoo

I carry most of what has been previously mentioned except bandaids. I do have a nice pocket knife I keep in my pack and I photo copied my drivers license and on the other side contact info should someone happen upon me and I am unconcious, one hairband, and gummy bears. If I am riding alone I take my SPOT.

[fourtycal]

I do carry I.D and insurance info

That is a good idea, I need to put that info in all my packs.

Park Multi-tool that I "borrowed" from Greyhairbiker
Tubes
Levers
pump
Cliff Bar

There are some great ideas in this thread, I will definitely be adding to my inventory

[Sombeech]

The gun thing is usually just for when I ride alone.

Is this just in case there's a scuffle between Uphill and Downhill getting the right of way?

[nd11nc]

This is my stuff:
*small first aid kit
*spare tube and tube sticks
*tool
*i-pod
*phone
*pump
*patch kit
*H2O
Have been thinking about a knife lately. When out late and it's getting dark, hate run into a hungry cat or a hungry something without something to defend myself with. GUN would be good, but don't think I will go that route at this time.

[cachehiker]

Far more people die in falls than from animal attacks. It's the #1 killer in the backcountry followed by drowning, exposure, lightning, and heart attacks. I don't recall where exactly animal attacks were ranked but it's somewhere around #12 or #15.

Always in the seat bag for the basic rides:
Spare tube
Tire lever
Pump
Patch kit
Crank Bros Multi-17
Mylar tire boot
Chain link or pin
+ 22-32 oz. water in a bottle

For longer rides in familiar territory I put up to 70 oz. of water in a Camelbak Siren or Rogue and stuff the following in it:
~500 calories of snacks/bars
Leatherman multitool
Kleenex pocket pack
2 oz. bottle of Sunscreen
Basic first aid kit
Lighter
+ 25-44 oz. Gatorade in a bottle(s)

For the truly epic rides I put up to 100 oz. of water in the Camelbak Mule along with all of the above and:
Another 500-1000 calories
Small flashlight
Map and cue sheet
GPS with FRS
And a full blown survival kit containing:
Backup first aid kit
Backup micro-lighter
Backup micro-flashlight
Waterproof matches
Flint starter
Fresnel lens magnifier
Tinder
Whistle
Signal mirror
Compass
Duct tape
Spool of upholstery thread
10 ft. of nylon cord
3 ft. of steel wire
Sewing needles
2 sq. ft. aluminum foil
Emergency mylar blanket
Water purification tablets
Pencil and pad
Leatherman Squirt P4
and I'm sure I'm forgetting a few things too
+ 44-64 oz. Gatorade in bottles

And yes, I've done one ride and a few hikes where we went through 164 fluid ounces in a day.

[tallsteve]

Shows you just how long the winter has been- I haven't looked in my pack for a while. I also carry tire levers and a chain master link.

[REDFOX]

I packed the gun because in my earlier days of riding it seemed like I would run into some bums and weirdos on the trail. As of the past few years it seems like all of the trails are more widely used and I have met some cool people.

[greyhair biker]

THATS where that Park tool kit went

I have to actually GO THRU my camelbak every once in a while just to make sure nothin's a growing in there...

-100oz. bladder
-pump
-first aid kit
-a ziplock baggie with toilet paper. Just try and use your sock ONCE and you'll thank me for remembering the important papers.
-emergency blanket
-handwarmer pak - hey, it wyoming
-a various assortment of powerbars, sportbeans & such
-park tool kit - I had two extra Keith -
-spare tube
-extra base layer - usually a shortsleeve undergear style compression T - super light and compact
-lube
....this stuff never leaves my camelbak.

Every 'spring' I disassemble the pak and hose it down - the sweat buildup....wow. can get a bit phunky.