So, a quick look around the net revealed this about ticks:

Adult ticks, which are approximately the size of sesame seeds, are most active from March to mid-May and from mid-August to November. Both nymphs and adults can transmit Lyme disease. Ticks can be active any time the temperature is above freezing.

As for prevention:

The best way to protect yourself against tickborne illness is to avoid tick bites. This includes avoiding known tick- infested areas. However, if you live in or visit wooded areas or areas with tall grass and weeds, follow these precautions to help prevent tick bites and decrease the risk of disease:

Wear protective clothing such as long-sleeved shirts, long trousers, boots or sturdy shoes and a head covering. (Ticks are easier to detect on light-colored clothing.) Tuck trouser cuffs in socks. Tape the area where pants and socks meet so ticks cannot crawl under clothing.

Apply insect repellent containing 10 percent to 30 percent DEET primarily to clothes. Apply sparingly to exposed skin. Do not spray directly to the face; spray the repellent onto hands and then apply to face. Avoid sensitive areas like the eyes, mouth and nasal membranes. Be sure to wash treated skin after coming indoors. Use repellents containing permethrin to treat clothes (especially pants, socks and shoes) but not skin. Always follow label directions; do not misuse or overuse repellents. Always supervise children in the use of repellents.

Walk in the center of trails so weeds do not brush against you. In camping areas, individuals who sit on the ground or disturb leaf litter on the forest floor may encounter ticks.

Check yourself, children and other family members every two to three hours for ticks. Most ticks seldom attach quickly and rarely transmit disease organisms until they have been attached four or more hours. If your pets spend time outdoors, check them for ticks, too.

If ticks are crawling on the outside of clothes, they can be removed with masking tape or cellophane tape. A ring of tape can be made around the hand by leaving the sticky side out and attaching the two ends. Ticks will stick to the tape which can then be folded over and then placed in the trash.

Gross!! Makes me itch just reading it.