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Darij Grinberg

Occasional hiker in the Black Forest and wherever else I have half a day to spare.

In real life, mathematician at Drexel University (Philadelphia, US).

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went for a hike

Yesterday at 17:31

2026-09-15 - Needham MA - Newton

Time

2h14m

Distance

9.34km

Speed

4.2km/h

Ascent

110m

Descent

120m

, and like this.

about 18 hours ago

I'd like to say the Sudbury aquaeduct is a nice trail, but as it stands, it is a sequence of neat little trails connected by unmarked crossings of various streets and roads, some of them quite busy, along with the occasional detour where not even this is possible. Still a lot better than most American

went for a hike

September 12, 2026 at 15:27

2026-09-12 - Middlesex Fells Boston

Time

2h49m

Distance

8.65km

Speed

3.1km/h

Ascent

100m

Descent

100m

about 18 hours ago

This seems to be one of the most conveniently transit-accessible parks in Boston.



If you're looking for a place to desensitize yourself to "no trespassing" signs, look no further: there is one on every third tree here, in one of the most popular spots of the trail :)

and went for a hike

September 7, 2026 at 16:14

2026-09-07 - Cutler Park, Needham, MA

Time

1h49m

Distance

5.23km

Speed

2.9km/h

Ascent

30m

Descent

40m

, , and others like this.

went for a hike

September 5, 2026 at 14:47

2026-09-05 - Flints Pond, Lincoln, MA

Time

1h46m

Distance

3.71km

Speed

2.1km/h

Ascent

40m

Descent

40m

and like this.

and went for a hike

August 31, 2026 at 15:37

2026-08-31 - Swarthmore

Time

1h20m

Distance

3.70km

Speed

2.8km/h

Ascent

80m

Descent

40m

likes this.

went for a hike

August 29, 2026 at 14:22

2026-08-29 - State College, PA

Time

0h35m

Distance

1.39km

Speed

2.4km/h

Ascent

0m

Descent

10m

and went for a hike

August 28, 2026 at 21:59

2026-08-28 - State College, PA

Time

1h59m

Distance

7.74km

Speed

3.9km/h

Ascent

70m

Descent

80m

likes this.

and went for a hike

August 25, 2026 at 15:01

2026-08-25 - Wissahickon: Forbidden Drive

Time

3h37m

Distance

12.1km

Speed

3.4km/h

Ascent

150m

Descent

140m

, and like this.

and went for a hike

August 22, 2026 at 15:32

2026-08-22 - Princeton

Time

5h08m

Distance

7.00km

Speed

1.4km/h

Ascent

20m

Descent

20m

, , and others like this.

went for a hike

August 10, 2026 at 12:09

2026-08-10 - Oberwolfach-Walke walk

Time

2h26m

Distance

2.54km

Speed

1.0km/h

Ascent

80m

Descent

70m

, , and others like this.

went for a hike

August 10, 2026 at 08:16

2026-08-10 - Wolfach - Oberwolfach via Langenbachmündung

Time

3h36m

Distance

10.1km

Speed

2.8km/h

Ascent

290m

Descent

270m

, , and others like this.

went for a hike

August 6, 2026 at 08:54

2026-08-06 - Oppenau - Nordrach

Time

5h48m

Distance

19.7km

Speed

3.4km/h

Ascent

800m

Descent

790m

August 6, 2026

Back to the long hike to the Kinzig. I've been fairly slow on this part, since I hadn't quite recovered from whatever I had caught last week in Philadelphia, but it was still mostly pleasant. The descent from Nordrach-Kolonie down to Nordrach proper was sunnier than I had hoped it would be (much of it

went for a hike

August 3, 2026 at 08:55

2026-08-03 - Oppenau

Time

1h06m

Distance

4.07km

Speed

3.7km/h

Ascent

60m

Descent

50m

, , and others like this.

August 4, 2026

This was meant to be a hike to Nordrach, but it got cut short by heat, jetlag and bad food. Will try again soon.



NB: The trail to Ibach west of the railway south of Schwarzhof is non-existent; follow the Schwarzwaldstraße (or whatever footpaths exist nearby).

went for a hike

July 18, 2026 at 16:20

2026-07-18 - Snow Lake (King County, WA)

Time

5h24m

Distance

13.6km

Speed

2.5km/h

Ascent

530m

Descent

500m

, , and others like this.

July 19, 2026

Warning: this is an extremely popular trail. We started at 9 AM and it was already fairly full. (Surprisingly the stream of tourists abated somewhat by early afternoon, but there was still no point where you couldn't hear some chatter in the distance.)

went for a hike

July 16, 2026 at 15:38

2026-07-16 - Seattle Montlake: Arboretum

Time

1h21m

Distance

7.01km

Speed

5.2km/h

Ascent

70m

Descent

60m

, , and others like this.

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