How to Achieve Level 99 Range on RuneScape as a F2P

Level 1 - 20 Ranged: Cows in the Lumbridge Cowfield should be your target for these novice levels. An alternative switch is chickens,which are one of the best to level 15, but you would probably get bored after level 15. The cowhides sell for over 100gp each, and the bones provide fairly good prayer experience for your current level. Just bank at Beefy bill's every time you get a full inventory of cowhides. Another alternative to the cowhides are bringing them to Al Kharid's tanner and making hard leather. This is a longer more boring process, but very profitable and easy to obtain.

Level 21 - 40 Ranged: Begin fighting chaos druids. They drop a wide variety of very good herbs, up to torstol, which sells around 10-20k each. You won't be damaged too much if you aren't too low of a level, but if you are low-leveled, bring some food. Tuna is a good and cheap delicacy to bring. Dwarves are also an option, but only work well until level 30. And they do not drop as much of profitable items as Chaos Druids do.

Level 41-50 Ranged: Train on hill giants in the Edgeville Dungeon southwest of Varrock. You need a brass key, which is very easy to obtain. Just ask someone to get one for you in the dungeon if you do not own one. Hill giants drop limpwurt roots very often, sell for 1k gp a piece, and their big bones give good prayer exp. Or if you are not into leveling your prayer you can sell the bones for good gold. You can make a lot of money per trip. Another option is training on white knights until level 50,though they can work until 60, it is not recommended to train on them till level 60, because they do get boring and do not drop good items.

Level 51-60 Ranged: Train on ogres, located southeast of Castle Wars. They drop big bones every time and also drop good seeds occasionally. They are also a reliable charm dropper. As long as you avoid melee distance, you won't take too much damage. Though they don't hit that high, only around 6 or 7 damage.

Level 61-70 Ranged: Train on green dragons in the Wilderness location(s). These are very good moneymakers, but you will need a rune c'bow + anti-dragon shield equipped plus quite some food and mithril bolts at the very least. Once you are at 65+, train on blue dragons as well so you don't get bored. Plus, they have rare drops more frequently than green dragons, and their hides are worth more. But watch out, though there are safe spots, you still have to run out and grab your loot so be careful, because they are over level 100. Also, you might also want to interfere range with your slayer tasks now. Another option is werewolves, which are good with iron knives or steel darts, and the wolf bones, which are dropped 100% of the time, can be alched or sold in the Grand Exchange for a good profit, or they can be used in summoning.

Level 71-80 Ranged: This is really up to you. You can spend some fun time and kill metal dragons in hope for a visage, but this is not very good exp. Aviansies are a good strategy. They're VERY profitable dropping adamant bars much of the time and are simple to kill with your current range level. Since the Aviansies are in the God Wars dungeon, you might want to bring a piece of Armadyl equipment in order to avoid other monsters from attacking you. The cheapest item to bring is an Armadyl Pendant acquired after the Temple of Ikov quest. Depending on your defense, decide on whether or not you need prayer potions (especially if you are pure range). Fire giants also work pretty well. They have decent drops and can't hit too high if you are good enough to avoid damage if you have low defence. The hill giants in Taverley Dungeon are great exp, too, and can be excellent experience until the mid-90s, since nearly nobody trains there. They have decent hitpoints, low defence, don't hit commonly, and if you use knives/magic shortbow with Ava's attractor, and a full dragonhide set with maybe Ranger boots and a Robin Hood Hat, you can achieve excellent experience in what is basically no time at all. The Tzhaar are also a very profitable enemy to train on since they drop Obsidian Charms and Obsidian weapons, cape, shield, etc. There are a few safe spots in the caves, too, so you don't have to worry about damage.