If you've read our main guide to driving in from Liberia, you already know the standard route to Playa Potrero is about as easy as road trips get — one highway, one turn, done. This post is about the other way in: the Monkey Trail, the back-road shortcut that comes up in nearly every conversation about getting here, and the one piece of the drive that genuinely deserves its own post.
The short version: it's real, it's popular, and it can save you a genuine 20 minutes. The catch is a river crossing that goes from a non-event to a bad idea depending on how much it's rained lately — so unlike the standard route, this one needs a bit of judgment, not just directions.
What (and where) is the Monkey Trail?
The Monkey Trail is the local nickname for Route 911, a back-road alternative that cuts across instead of looping through Huacas and Brasalito the way our main driving route does. It's mostly paved but rougher than the highway, narrower, with no painted lines, guardrails, or streetlights, and it includes a river crossing. The upside is real: roughly 20 minutes off the drive, and a far more interesting one — you're genuinely in the back country, not on a highway.
The catch: the river crossing
Whether the crossing is a non-event or a bad idea depends entirely on how much it's rained recently, and that can change week to week during green season:
- Dry season (roughly February–April): the easiest window — rivers can shrink to small puddles. A regular sedan can often get through, though a bit of ground clearance never hurts.
- January: generally passable for 4x4s; sedans not recommended.
- May–June: water starts rising as the rains return; sedans should use the Congo Trail bridge instead (see below) rather than risk the crossing.
- July–August: typically a brief drier break — the same "Veranillo" we cover in our weather post — then heavy, consistent rain returns by late August. 4x4 only, and an experienced driver.
- September–November: peak rainfall. This is flash-flood territory — extreme caution, or just take the standard route.
Skip the river entirely: the Congo Trail bridge
There's a bypass if you'd rather not gamble on the crossing: the Congo Trail, a private bridge that runs roughly 5,000 CRC ($10 USD) per vehicle, open 6am–7pm daily. It's the sensible call for a sedan any time the rivers are questionable — you still get most of the shortcut's charm without the river.
Worth taking seriously: this isn't just an inconvenience — flash floods on Guanacaste's river crossings can and do happen quickly, and they're genuinely dangerous. If the crossing looks high, fast, or brown with runoff, don't chance it. It's also worth knowing that no rental car insurance in Costa Rica — not even the credit-card kind — covers water damage from a river crossing.
Check conditions before you go
Conditions change fast enough during green season that no article — including this one — should be your only source. Before you commit to the Monkey Trail, check the Monkey Trail River Crossing Facebook group, where locals post current, sometimes same-day photos and reports of the crossing. A quick post asking "how's the river today?" usually gets an answer within the hour.
A few practical tips for the Monkey Trail
- Avoid night driving on it altogether. There are no streetlights and the terrain is genuinely tricky in the dark — save it for daylight, full stop.
- Check the Facebook group the same day if it's rained in the last 48 hours. Conditions can flip fast in green season, so a report from three days ago isn't good enough.
- Skip it in a low sedan outside dry season. A high-clearance 4x4 is the right call from May through November; a regular car is really only comfortable February through April.
- When in doubt, take the standard route. It only costs you about 20 extra minutes and none of the uncertainty — see our full driving guide for the turn-by-turn.
- Remember the insurance gap. Water damage from a river crossing isn't covered by rental insurance, credit-card coverage included — one more reason to check conditions first.
Which route should you take?
If this is your first trip, or you're arriving in green season, just take the standard route — it's foolproof and only about 20 minutes longer. If you've checked conditions, you're comfortable on a rougher back road, and it's been dry, the Monkey Trail is a genuinely fun way in. Full turn-by-turn directions, including the last mile into Casa Daniel and Casa Roberta, are in our main driving guide: From LIR to Pura Vida: The Real Guide to Driving Liberia to Playa Potrero.
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Questions about the drive, or which route makes sense for your trip? Reach out — you'll get us, not a call center.