The best running trails in Patapsco Valley State Park Deep Run Area
5.0
(18)
592
runners
61
runs
Last updated: October 8, 2025
9
runners
1. Lost Lake – Ilchester Tunnel loop from Saint Denis
19.9km
02:14
90m
90m
Expert run. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
15
runners
2. Lost Lake – Ilchester Tunnel loop from Avalon
8.60km
01:03
40m
40m
Intermediate run. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.
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27
runners
3. Small Building Ruins – Lost Lake loop from Patapsco Woods
27.0km
03:17
430m
430m
Expert run. Very good fitness required. Sure-footedness, sturdy shoes and alpine experience required.
6
runners
4. Lost Lake loop from Patapsco Woods
16.1km
02:03
300m
300m
Expert run. Very good fitness required. Sure-footedness, sturdy shoes and alpine experience required.
4
runners
5. Waterfall – Lost Lake loop from Halethorpe
19.3km
02:07
250m
250m
Expert run. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
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