Runs for 2 miles from Black Rock in the south to Lower Longbeak in the north. Black Rock is dog friendly all year round. Large car park, toilet, cafe and beach shop. Very popular beach which can get very over crowded in the summer. Great water for surfing and watersports (be careful at low tide due to riptides near the rocks.) Easy accessible but bit of a steep climb on the soft sand back to the car park.
This is a nice beach, it was very wet when we went here but it is a very large beach with lots of room for walking, running and exploring around the rocks. 5 out of 5.
Summerleaze - Bude.
Lovely beach. well loved by surfers and dog walkers. Beach cafe "lifes a beach" and RNLI shop next to the beach. Lifeguard patrolled in high season, easily accessible via slope or steps. Toilets next to the RNLI shop. Large car park (pay and display).
We liked this beach but it was quite small so not very much walking to be done. 4 out of 5
Trebarwith Strand - Tintagel
A lesser known beach near to Tintagel. There is no beach at high tide but during low tide there is a good amount of sand. Dogs permitted all year. Lifeguard patrolled in summer. During high tide its quite nice to stand and watch the sea wash over the slate rocks which you can access from the surf shop near the Port William inn.
We enjoyed watching the sea and seeing it wash over the rocks (see video below) but as it was high tide we didn't get to go on the beach or in the water so cant comment on how good it is.
More info on the beaches of Cornwall that are dog friendly can be found on Cornwall in Focus (will open in new window) but these are the 3 beaches we visited whilst in the area.