diff --git a/app/controllers/sketches_controller.rb b/app/controllers/sketches_controller.rb
index 4281e78..ffbceeb 100644
--- a/app/controllers/sketches_controller.rb
+++ b/app/controllers/sketches_controller.rb
@@ -15,6 +15,7 @@ def show
   
   def new
     @sketch = Sketch.new
+    @challenge_id = params[:challenge_id]
   end
 
   def create
diff --git a/app/views/challenges/show.html.erb b/app/views/challenges/show.html.erb
index 9995b2b..e81df2c 100644
--- a/app/views/challenges/show.html.erb
+++ b/app/views/challenges/show.html.erb
@@ -3,7 +3,7 @@
   
   <div class="challenge-voting-page">
     <h2><%= link_to "Vote", challenge_sketches_challenge_path(@challenge), class: "votes-challenge-button" %></h2>
-    <h2><%= link_to "Participate", new_sketch_path, class: "participate-challenge-button" %></h2>
+    <h2><%= link_to "Participate", new_sketch_path(challenge_id: @challenge.id), class: "participate-challenge-button" %></h2>
   </div>
 
   <a href="#description-anchor" class="scroll-to-description">
diff --git a/app/views/sketches/_form.html.erb b/app/views/sketches/_form.html.erb
index ba77a88..61949d4 100644
--- a/app/views/sketches/_form.html.erb
+++ b/app/views/sketches/_form.html.erb
@@ -18,7 +18,11 @@
   
   <div>
     <%= form.label :challenge_id %>
-    <%= form.collection_select :challenge_id, Challenge.all, :id, :title, prompt: true %>
+    <% if @challenge_id.present? %>
+      <%= form.collection_select :challenge_id, Challenge.all, :id, :title, { selected: @challenge_id }, promt: true %>
+    <% else %>
+      <%= form.collection_select :challenge_id, Challenge.all, :id, :title, prompt: true %>
+    <% end %>
   </div>
 
   <div class="sketch-form-submit">