# mountdiablo — Contra Costa Mount Diablo > Official visitor guide for Mount Diablo State Park with maps, events, and park info. (iPhone/iPad app by Gary Phelps.) - Source: https://appshunter.io/ios/app/mountdiablo/id6756897782 (this page in markdown: same URL + `.md`) - Developer: [Gary Phelps](https://appshunter.io/developer/1781488769) - Category: Health & Fitness, Lifestyle - Price: Free - Rating: 5.00/5 from 1 App Store ratings · 1 written reviews indexed - Age rating: 4+ - Requires: iOS 14.0 · 20 MB - Languages: American English - Released: 2026-01-02 - Data updated: 2026-06-30 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/mountdiablo/id6756897782/reviews.md ## What is mountdiablo? Mount Diablo - Official Visitor Guide Discover the natural beauty and outdoor adventures of Mount Diablo State Park with the official visitor guide app. Whether you're planning a day hike, mountain bike ride, or family picnic, this comprehensive app is your essential companion for exploring Contra Costa County's most iconic peak. Key Features: Interactive Trail Maps Navigate Mount Diablo's extensive trail network with detailed maps and trail information. Find the perfect route for your skill level, whether you're looking for a leisurely stroll or a challenging summit hike. Events & Activities Stay informed about upcoming events, guided hikes, educational programs, and special activities happening throughout the park. Never miss an opportunity to connect with nature and the Mount Diablo community. Park Information Access essential park information including hours, fees, facilities, parking, and seasonal updates. Get the latest news and announcements to help plan your visit. Practical Tools Find restrooms, water fountains, picnic areas, and other amenities. Get weather updates and trail conditions to ensure a safe and enjoyable visit. Safety & Emergency Access emergency contact information and location sharing features to stay safe during your outdoor adventures. Share your location with friends and family for peace of mind. ## Key features - Interactive trail maps - Events and activities calendar - Essential park information - Practical amenity finder - Safety and emergency features - Weather and trail condition updates ## Recent user reviews (1 of 1) All indexed reviews: https://appshunter.io/ios/app/mountdiablo/id6756897782/reviews.md ### 5/5 — Awesome and Useful *2026-01-02* So helpful when visiting Mt. Diablo. Even has emergency quick access. Great for the whole family! ## Frequently asked questions about mountdiablo ### What can I do with the mountdiablo app? The mountdiablo app allows you to discover Mount Diablo State Park's natural beauty and outdoor adventures. You can navigate trails with interactive maps, stay informed about events and activities, and access essential park information like hours and fees. ### Is mountdiablo free to download? Yes, mountdiablo is completely free to download and use. There are no in-app purchases or subscription fees required to access its features. ### What devices does mountdiablo support? mountdiablo is available for iPhone, iPad, and iPod devices. It is designed to provide a seamless experience across these Apple platforms. ### How often is mountdiablo updated? The latest version of mountdiablo is 1.0.4, and it was last updated on February 19, 2026. This indicates regular updates to ensure the app is current and functional. ### Does mountdiablo have ads? No, mountdiablo does not contain advertisements. The app is ad-free, allowing for an uninterrupted user experience while exploring the park. ### What is the age rating for mountdiablo? mountdiablo has an age rating of 4+, making it suitable for users of all ages. This suggests content appropriate for children and adults alike. ### Can I find restrooms and water fountains with mountdiablo? Yes, the app includes practical tools to help you locate amenities such as restrooms and water fountains within Mount Diablo State Park. This feature aids in planning a comfortable visit. ### Does mountdiablo offer emergency contact information? Yes, mountdiablo provides access to emergency contact information and location sharing features. This is designed to enhance safety during your outdoor adventures in the park. ## Version history (last 5 releases) ### 1.0.4 — 2026-02-19 - New summit cam! It's snowing on mount diablo! - New application icon for the community! ### 1.0.3 — 2026-02-13 New latest icon for the mount diablo community! ### 1.0.2 — 2026-02-07 Major Update: v1.7.0 brings powerful new safety and cyclist features! NEW FEATURES: Mt Diablo Cyclists Hub • Complete info on 67 bike turnouts • Historic easement reopening details • Bike repair station locations • Direct link to Mount Diablo Cyclists organization Weather & Air Quality Center • Real-time weather from 4 key locations (Summit, Junction, Rock City, Mitchell Canyon) • Live Air Quality Index (AQI) monitoring • Integrated webcams for current conditions • Beautiful, easy-to-read interface Traffic Monitor • Real-time visitor traffic conditions • Parking availability status • Peak time visitor tips IMPROVEMENTS: • Enhanced Safety section (formerly Emergency) • Report unsafe drivers directly to park rangers • Modern gradient-based home screen design • Improved navigation with 6 focused tiles • Better visual hierarchy throughout Your safety and experience on Mount Diablo is our priority. This update brings essential real-time information right to your fingertips! ### 1.0.1 — 2026-01-04 - Directions are now working with maps integration. - Weather Information on parts of the mountain now updated with live weather and aqi. ### 1.0 — 2026-01-02 No release notes. --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-30.*