Roaming is when a laner leaves their assigned lane to make something happen elsewhere on the map. A kill bot, a plate top, vision control that wins your team the next dragon fight, baiting the enemy jungler into matching your path. It is the highest-leverage thing a mid laner does after laning, and it is most of what separates mid laners who climb from mid laners who get stuck farming a lane they already won.
Roaming and ganking overlap but they are not the same thing. A roam is defined by the source: a laner abandons their assigned area to influence somewhere else, and the defining feature is opportunity cost (the CS, XP, lane pressure, or ADC protection they gave up to leave). A gank is defined by the destination: a non-resident champion arrives in a lane and creates kill pressure. A mid laner walking bot is a roam from mid's perspective and a gank from bot's perspective. A jungler showing up mid is a gank but not really a roam, because the jungler had no lane to leave. The skill this article is about is the source-side decision: when to leave, how to get there, what to do once you arrive, and what it costs you. For the destination side (gap closers, executing the kill, dive setup), see the gank guide.
Which Roles Roam (and Which Ones Should Not)
Mid is the primary roaming role. The lane is short, the river entrances are right next to you, and you can reach every other lane and every objective faster than any other position. If you play mid and you do not roam, you are leaving most of your impact on the table.
Support roams second. The opportunity cost is low because the ADC owns the CS, so leaving lane mostly costs you XP rather than gold. The constraint is your ADC: leaving them in a 1v2 against a fed bot lane gets them killed, and now you have made the lane worse, not better.
Top roams rarely, and usually through Teleport, not physically. Top is the farthest lane from every other objective except the Rift Herald pit. Walking from top to bot through river takes long enough that the play is usually over by the time you arrive. Teleport is a different mechanic and a different decision.
Some champions should not roam. Immobile control mages like Viktor, Xerath, and Veigar have no engage, no escape, and no way to win a 2v2 in the river. They contribute more by sitting mid, farming, taking plates, and being available for the fight when it comes to them. If your kit cannot create kill pressure on arrival, the roam is mostly a CS donation to the enemy mid.
What Has to Be True Before You Roam
Roaming on a coin flip is how you give up two lanes at once. Before you leave, four things should be in place:
- The wave is shoved. If your wave is sitting in the middle of lane, leaving means the enemy free-shoves it into your turret. You lose CS and possibly a plate. The setup is: shove hard, let it crash into the enemy turret, then leave. Now they are stuck clearing minions while you go play 3v2 elsewhere.
- You have vision of the enemy laner. If they are missing, they might be roaming the same direction you are with a head start. Walking blind into a 2v2 mid-roam is one of the worst-feeling deaths in the game.
- You have mana, cooldowns, and Flash. Roaming with no mana for your engage or no Flash for an escape turns the play into a coin flip. The whole point is to enter the next lane with a kit advantage.
- Your ally can follow up. Ping intent, wait for them to acknowledge, then go. A 2v2 dive where bot lane refuses to engage is just you dying alone.
If you do not know where the enemy jungler is, add a fifth check. Roaming through unwarded river when you last saw the jungler topside is a coin flip you do not need to take. Wait for vision or take a deeper jungle path.
The Opportunity Cost of a Roam
Every roam burns time, and time off-lane has a price. The cleanest way to think about whether a roam is worth it is to compare what you gain to what you give up. A bot roam that produces nothing because their support flashed is sometimes still fine if you forced the flash and your wave was crashing anyway. A bot roam that produces nothing AND cost you a plate AND cost you 30 CS is a net loss.
What you give up in the time it takes to roam:
- CS and XP. The exact value of a missed wave depends on game time (see the table below). Missing two waves at 15 minutes is roughly the cost of a small item component.
- Turret plates. If your wave is not shoved and you leave, your turret takes minion damage and the enemy can chip a plate. Usually only one plate per push, because plates harden with the Bulwark effect after each one breaks (the turret gets more resistance the more plates it has lost). But one plate is 120 gold to the enemy, and that gold came directly out of your lane.
- Lane priority. When you come back, the enemy may have full priority. They can deny your next recall, contest the next scuttle, or roam unpunished themselves.
Wave and structure gold values:
| Source | Gold | Notes |
|---|---|---|
| Melee minion | 20 | 3 per wave (2 per wave after a cannon spawns post-14:00) |
| Caster minion | 14 | 3 per wave (2 per wave post-30:00) |
| Cannon minion (pre-14:00) | 50 | Every 3rd wave |
| Cannon minion (14:00–25:00) | 59 | Every 2nd wave |
| Cannon minion (25:00+) | 66 | Every wave |
| Average non-cannon wave | ~102 | 3 melee + 3 caster |
| Average cannon wave (early) | ~152 | Includes cannon |
| Average wave value at 25:00 | 148 | Cannon every wave makes the average climb |
| Tower plate | 120 local | 5 plates per outer turret, plates persist until destroyed or turret falls |
| All 5 plates | 600 local | Plus the turret bounty if you take it |
| Outer turret (first one of the game) | 50 global + 300 bonus | First-turret bonus is split among the team |
| Outer turret (subsequent) | 50 global | Plus any unclaimed plates |
What you gain depends on what the roam produces. A kill is the biggest single payout, and the gold value is roughly 300 base for an even kill, but the more interesting number is the XP, because that determines whether the kill snowballs into a level lead.
| Slain champion's level | Solo XP (one ally credits) | Shared XP per ally (kill + 1 assist) |
|---|---|---|
| 1 | 42 | ~14 |
| 3 | 144 | ~48 |
| 6 | 234 | ~78 |
| 7 | 308 | ~126 |
| 9 | 486 | ~219 |
| 11 | 640 | ~288 |
| 14 | 790 | ~356 |
| 18 | 990 | ~446 |
A few things to take from this. Solo XP roughly doubles between level 6 and level 9, which is why a successful pre-9 roam can put the enemy laner so far behind on power spikes. Shared XP is 66.6% of the solo value at slain levels 1–6, 82% at slain levels 7–8, and 90% from slain level 9 onward, split equally among everyone within range. So a kill that gets shared by two allies is not as bad as players assume at low levels and is genuinely good at high levels. The kill gold scales with kill streaks and shutdowns, but for back-of-the-envelope math you can treat a successful gank as roughly 300 gold to the killer plus assist gold.
Roam Timing Windows
Some windows are dramatically better than others. The cleanest ones:
The cannon wave. Cannon (siege) minions spawn at 1:30, then every 3 waves until 14:00, every 2 waves until 25:00, and every wave after 25:00. The cannon is heavy and tanky, so it pushes hard and takes the enemy several extra seconds to clear under their tower. If you crash a cannon wave into the enemy turret and then leave, your enemy laner is stuck clearing minions for roughly 6 to 10 extra seconds compared to a normal wave. That is the cleanest roam window in the game, and it is why "cannon-wave roam" is shorthand for "the obvious time to leave mid."
After a recall. You shoved, recalled, refilled mana, bought boots or a component. The wave is bouncing back toward you. You can move through river to gank bot before stepping back in lane, and the enemy mid laner just got their wave from your shove, so they are sitting on it.
After the enemy uses a key cooldown. Enemy mid blew Flash at 3:00 dodging your jungler? Their lane is gankable for the next five minutes and so is the side lane they roam to. If they used their ult to clear a wave, they have nothing to engage or escape with for the next minute. That is your window.
Right after a base. An underrated roam window. As soon as you go back, the enemy team sees the B and relaxes for the next 10 to 20 seconds because they know you cannot be on the map. If you finish your recall fast and head straight to a side lane instead of back to mid, you can show up while they are still mentally treating you as based. This works best when the destination lane has an initiator or gap closer (their lane partner or your jungler) who can lock down the kill before the enemy resets their attention. It does not work on a champion with no engage of its own going to a lane that also has no engage, because the enemy will have time to disengage once they see you. Champions like Xerath are particularly bad at this kind of roam.
Reading the Enemy: When They Roam, What to Do
When the enemy mid leaves lane, the wrong default is to follow. Following only works if you can actually be helpful when you arrive. A common lower-elo mistake is that your enemy laner roams, so you try to follow, but they had enough of a lead that the fight is already decided before you get there. Your team loses anyway, and you end up walking back to lane having accomplished nothing.
If you frequently follow roams and then are not helpful when you arrive, that is a sign you are doing this wrong. The right move depends on the map state:
- If you can actually arrive in time and shift the fight, follow. This usually means your jungler is matching, the destination is close, and you have a way to engage or peel.
- If the fight will be decided before you arrive, play the opposite side. When the enemy mid commits to one side of the map, your team has a numbers advantage on the other side. Pressure the open side lane, take a plate, or rotate to the opposite-side objective. This is especially valuable top-side because the numbers asymmetry is bigger (only two players normally live there); bot-side is murkier because there are already four champions, so a single addition changes things less.
- If you cannot do either, take their stuff. Push their wave into their tower while they are away, take their raptors or krugs on the way back, and deny their roam a clean re-entry.
A very specific thing to watch: if dragon is up and the enemy roams top, following them top usually loses you dragon. The trade is real and it is rarely worth it as the mid laner. Same as the jungler: matching an enemy jungler topside when dragon spawns in 90 seconds is how you watch dragon die on a ward.
Bait Roams (Yours) and Counter-Baiting (Theirs)
If you cannot get clean roams off because the enemy is too responsive (they back up the moment you walk to river, their bot lane disengages every time you ping missing), you have two tools. Both rely on the fact that their response to your roam also has a cost.
Bait type 1: pressure-only roam. Walk toward river, get spotted, then turn back and shove your wave instead. They had to give up lane priority and play safe because they thought you were coming. You did not actually leave lane, so you also got to clear your wave. Net result: you exerted side-lane pressure (they had to back off) while still farming. Repeat this enough and you have effectively built a free CS advantage in mid while making them play paranoid.
Bait type 2: river-bait turn. Walk into river deeply enough that the enemy mid follows you (either to match the roam or to punish you for over-extending), then turn back onto them. If you have vision control of the river and a kit that wins 1v1s in close quarters (Zed into a control mage is the canonical example), you punish them once and the next several roams get much easier, because now they have to think "what if they are just waiting for me?" That mental tax is worth more than the single kill.
Both baits are ELO-dependent. In low elo, opponents often will not respond either way, so the bait does not get a bite. That is not a failure: it just means you got to fast-shove your wave or actually complete the roam unmolested. In high elo, the responsiveness is what makes the bait work in the first place.
The same logic runs in reverse. When the enemy mid "roams," you have to consider whether it is bait. Champions that win 1v1s in close quarters and can establish vision control (Zed, Talon, Fizz, Katarina) are the most likely to bait. If you see one of them disappear into their own jungle near river with a control ward placed and no clear destination, do not follow blind. Push your wave, take what they leave behind, and wait for actual map information before committing. If they actually went bot, you will see the play start and can rotate then. If they were waiting in a bush to kill you, you saved a death.
When NOT to Roam
Players who roam at the wrong time give up two lanes at once. The clear "do not leave" cases:
- An objective is up and the roam would commit you to the wrong side. Dragon spawns in 90 seconds and the enemy jungler is bot-side. Roaming top right now will not finish before dragon contest starts, and you will be on the wrong side of the map. The decision is harder than "do not roam during objectives" because sometimes roaming bot to set up the dragon fight is exactly right. The actual question is whether the roam puts you closer to or farther from the contest.
- Your wave is pushing toward you. Leaving means the enemy free-shoves and you lose a plate or the wave. Reset the wave first, then go.
- Enemy mid is shoving into you. If they have priority and the wave is crashing into your turret, leaving means giving up CS to a laner who is already winning lane state. Clear the wave first.
- You have no vision of the enemy jungler or a global-ult champion on their team. Roaming with no vision is risky in general, and it gets significantly worse when Shen, Twisted Fate, Pantheon, or a similar global threat is alive somewhere off-map. Their entire team can collapse on your roam from the other side of the map. Wait for vision or take a deeper path.
The case that gets handled badly in most guides: roaming when you are behind. The reflex advice is "do not roam when you are 0/2," but that is too simple. If you are behind, you have two real options:
- Abandon the lane and try to win other parts of the map. Your lane is lost and there is nothing to gain by staying. Cross-map, look for a play side lane, and accept that mid is going to bleed.
- Minimize the damage of your own lane and stay available. If your champion is bad at roaming when behind (a control mage with no engage that is also down a level), the most useful thing you can do for your team is clear waves quickly, not die, and keep your enemy laner stuck in lane instead of free to roam. If the enemy then commits to a roam, you can cross-roam to the opposite side of the map and try to make a play there, because the numbers math just swung.
What you should not do when behind is force the same roams you were trying when even. You do not have the kill pressure to make them work, and dying again compounds the deficit.
Common Roaming Mistakes
- Roaming at low HP. If you are at 40% HP, a single CC chain ends the roam. The 3v2 you wanted becomes a 1-for-1 trade in their favor because you blew up first. Reset before you go.
- Telegraphed roams. If your wave is in the middle of lane and you walk into river, the enemy support pings missing instantly. Always shove first. The enemy laner clearing a crashed wave under their own turret has 4 to 8 seconds where they are too busy to ping mid is missing.
- Roaming to the wrong lane. A roam to a bot lane that is already 4/0 has diminishing returns. The bigger swing is fixing the losing lane. Roam to the lane that needs help, not the one already winning.
- No vision before stepping out. Walking into a face-check on river with no ward is how you die before the roam even starts. A control ward in tri-bush or river brush solves this.
- Roaming with no follow-up. Pinging once and committing without confirmation that your ally is engaging is a 1v2 with extra steps.
- Forgetting to come back. A successful bot roam that ends with you sitting in the bot bush for 20 extra seconds soaking nothing is still a net loss. The play is: roam, execute, return. The longer the round trip, the harder it is to break even.
- Following every enemy roam. If you keep arriving too late to be useful, you are doing this wrong. Push, plate, or play the opposite side.
Roaming is one of the highest skill-ceiling actions in League because it requires reading wave state, vision, summoner cooldowns, and team positioning all at once. Get the prerequisites right and the rest follows. Wave management is the foundation: without a shoved wave, you are not roaming, you are just feeding mid lane to your enemy. For the destination side of the play (executing the kill when you arrive), see the gank guide. For role-specific decision-making on when to roam vs when to farm, see the mid lane guide and the support guide.
