V tomto terénu se dá stoupat pomalu.

Because the preposition v meaning in requires the locative case when it means location.

So:

• ten terén = the terrain (nominative)
• v terénu = in the terrain / on this kind of ground
• v tomto terénu = in this terrain

Both words change:

• tento → tomto because it is masculine singular locative
• terén → terénu because it is also masculine singular locative

So v tomto terénu literally means in this terrain.

Tomto is the locative form of tento, which means this.

Here is the basic pattern:

• ten = that / the (depending on context)
• tento = this
• v tomto = in this

A learner might expect v ten terén, but that would be wrong because Czech changes forms for case.

You could also hear more colloquial forms in speech, such as:

• v tomhle terénu = in this terrain / in this kind of terrain

That is more informal.
V tomto terénu sounds neutral and standard.

In this sentence, se dá + infinitive is an impersonal construction meaning something like:

• it is possible to ...
• one can ...
• ... can be done

So:

• se dá stoupat = it is possible to climb / ascend
• more naturally: you can climb / ascend

The se here is not really reflexive in the sense of oneself. It is part of a common Czech pattern that makes the sentence impersonal.

Very common examples:

• Tady se dá parkovat. = You can park here.
• To se dá zvládnout. = That can be managed.
• Odtud se dá dojít pěšky. = You can get there on foot from here.

So in your sentence, se dá does not mean gives itself or anything literal like that.

That is a very common source of confusion.

Yes, dát normally means to give. But Czech also uses dá se + infinitive idiomatically to mean:

• it can be done
• it is possible to
• it is manageable / feasible

So even though the basic verb is dát, in this pattern it no longer feels like the ordinary English verb give.

For example:

• Dá se to udělat. = It can be done.
• Dá se tam dojet vlakem. = You can get there by train.
• V tomto terénu se dá stoupat pomalu. = In this terrain, you can ascend slowly.

It is best to learn dá se + infinitive as a set expression.

Stoupat means to rise, to go up, to ascend, or to climb upward, depending on context.

In this sentence, it refers to moving upward through the terrain, so translations like these work:

• to ascend
• to go uphill
• to climb upward

It is an imperfective verb, which fits well here because the sentence talks about the general manner or possibility of the activity, not a completed result.

So the sentence is not about reaching the top, but about the process of ascending.

Because it follows the pattern dá se + infinitive.

This construction works like:

• dá se dělat = it can be done
• dá se jít = it is possible to go
• dá se stoupat = it is possible to ascend

So the infinitive is exactly what you expect after dá se.

Pomalu is an adverb meaning slowly.

It modifies stoupat, so:

• stoupat pomalu = to ascend slowly

The sentence says not only that ascending is possible, but that it can be done slowly in this terrain.

That suggests the terrain allows gradual upward movement rather than requiring a quick or difficult climb.

That is the most neutral and natural position here.

Czech word order is flexible, but the end of the sentence often carries important or new information. So:

• V tomto terénu se dá stoupat pomalu.

sounds natural and straightforward.

You could change the word order for emphasis, for example:

• Pomalu se dá v tomto terénu stoupat.
• V tomto terénu se pomalu dá stoupat.

But those sound less neutral or more stylistically marked. The original sentence is the normal choice.

Not really. This is an impersonal sentence.

Czech often leaves out a specific subject when English would use something like:

• you
• one
• it

So V tomto terénu se dá stoupat pomalu literally works more like:

• In this terrain, it is possible to ascend slowly.

But in natural English, you often translate it as:

• In this terrain, you can climb slowly.
• On this terrain, it’s possible to ascend slowly.

So the sentence does not mean that a particular person is doing the climbing. It states a general possibility.

Yes. That is often the most natural English translation.

Czech impersonal constructions often correspond to English you can, one can, or it is possible to.

So these are all reasonable translations depending on context:

• In this terrain, you can ascend slowly.
• In this terrain, one can ascend slowly.
• In this terrain, it is possible to ascend slowly.
• On this kind of ground, you can climb gradually.

English often prefers you can because it sounds natural, even though Czech does not explicitly say ty or vy.

You may hear both kinds of expressions, but dá se + infinitive is especially idiomatic for general practical possibility.

Compare the nuance:

• dá se stoupat = it is possible / manageable / feasible to ascend
• může se stoupat = grammatically possible, but less idiomatic here for many speakers

In many cases, Czech prefers dá se when talking about whether something can realistically be done.

So V tomto terénu se dá stoupat pomalu sounds very natural.

It usually means:

• terrain
• ground
• land surface
• field conditions

Depending on context, v tomto terénu could suggest:

• this kind of landscape
• this type of ground
• these surface conditions

So the exact English wording may vary. If the context is hiking or climbing, you might translate it more naturally as:

• On this terrain
• In this kind of terrain
• On this ground

By itself, yes. Stoupat can also mean to rise in a more abstract sense, for example:

• Ceny stoupají. = Prices are rising.
• Teplota stoupá. = The temperature is rising.

But in V tomto terénu, the context clearly points to physical upward movement, so here it means to ascend / go uphill / climb upward.

It is grammatical and natural, though slightly on the descriptive side.

A native speaker could certainly say it, especially in contexts like:

• hiking
• mountaineering
• route descriptions
• discussing landscape or accessibility

In casual conversation, someone might also say something like:

• V tomhle terénu se dá jít do kopce pomalu.
• V tomhle terénu se dá stoupat docela pomalu.

But the original sentence is perfectly good standard Czech.

It breaks down like this:

• V tomto terénu = in this terrain
• se dá = it is possible / one can
• stoupat = to ascend / go uphill
• pomalu = slowly

So the full structure is:

In this terrain + it is possible + to ascend + slowly

Or more naturally in English:

In this terrain, you can ascend slowly.