Boston Marathon logo
BOSTON MARATHON 2025

Thomas Karrasch

Bib: 11518•M

WV

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 28404
Top 27%
Gender (Male)
#0 / 16105
Top 40%
Masters (Masters Men)
#0 / 10463
Top 27%
Division (M45-49)
#0 / 2386
Top 38%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent
Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
5K· 3.11 mi
7:13/mi
22:24
↑ 97↓ 3451.5%
10K· 6.21 mi
7:05/mi
44:24
↑ 79↓ 1380.4%
15K· 9.32 mi
7:04/mi
1:06:20
↑ 67↓ 78
20K· 12.43 mi
7:07/mi
1:28:26
↑ 106↓ 860.1%
Half· 13.11 mi
7:04/mi
1:33:15
↑ 19↓ 370.5%
25K· 15.53 mi
7:04/mi
1:50:22
↑ 66↓ 880.2%
30K· 18.64 mi
7:12/mi
2:12:44
↑ 181↓ 1480.2%
20M
7:24/mi
2:22:48
↑ 64↓ 500.2%
21M
7:52/mi
2:30:40
↑ 106↓ 241.6%
35K· 21.75 mi
7:14/mi
2:36:05
↑ 17↓ 861.7%
23M
7:51/mi
2:45:55
↑ 23↓ 630.6%
24M
7:45/mi
2:53:40
↓ 821.3%
40K· 24.85 mi
8:25/mi
3:00:52
↓ 200.3%
25.2M
9:20/mi
3:04:05
↑ 13↓ 160.2%
Finish· 26.22 mi
7:55/mi
3:12:09
↑ 22↓ 21

The Course

Is this your race?

Claim it — unlock a deeper AI report on this race, free

A personalized Race Performance Report that goes beyond this page — emailed to you, built from your real splits.

Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:33:15
Pace7:07 /mi
2nd Half
Distance13.11 mi
Time1:38:54
Pace7:33 /mi
📊Positive Split: 6.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:49:2222:247:1322:24
7:13
-
10K
6.21 mi11:11:2244:247:0922:00
7:05
-0:08
15K
9.32 mi11:33:181:06:207:0721:56
7:04
-0:01
20K
12.43 mi11:55:241:28:267:0722:06
7:07
+0:03
Half
13.11 mi12:00:131:33:157:074:49
7:04
-0:03
25K
15.53 mi12:17:201:50:227:0617:07
7:04
0:00
30K
18.64 mi12:39:422:12:447:0722:22
7:12
+0:08
20M
20.00 mi12:49:462:22:487:0810:04
7:24
+0:12
21M
21.00 mi12:57:382:30:407:107:52
7:52
+0:28
35K
21.75 mi13:03:032:36:057:115:25
7:14
-0:38
23M
23.00 mi13:12:532:45:557:139:50
7:51
+0:37
24M
24.00 mi13:20:382:53:407:147:45
7:45
-0:06
40K
24.85 mi13:27:503:00:527:177:12
8:25
+0:40
25.2M
25.20 mi13:31:033:04:057:183:13
9:20
+0:55
Finish
26.22 mi13:39:073:12:097:208:04
7:55
-1:25

Checkpoints & Pacing

📈Pace Line

Pace Progression

Track your pace changes throughout the race. Dot colors mark your quickest to easiest segments, relative to your own pace.

Fastest Pace

7:04 /mi

Average Pace

7:20 /mi

Slowest Pace

9:20 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

0:00

0% of race

Time at Steady Pace

2:28:13

77% of race

Time at Slower Pace

43:56

23% of race

Average Pace: 7:20 /mi

Loading chart...
Faster pace (< avg)
Steady pace (≈ avg)
Slower pace (> avg)

🎨Heatmap

Pace Heatmap

Where you sped up and eased off relative to your own pace across the race. Colors are relative to your own range, not to other runners.

Loading...
0mi6.6mi13.1mi19.7mi26.2mi
Pace:
Faster
Steady
Slower

Click or hover over segments to see details

✨Sparklines

Checkpoint Splits with Pace Trends

Overall Pace Trend

CheckpointDistanceTime of DayTimeAvg PaceSegmentPaceTrendRank
5K
3.11 mi10:49:2222:247:1322:24
7:13
#9525
10K
6.21 mi11:11:2244:247:0922:00
7:05
#8981
15K
9.32 mi11:33:181:06:207:0721:56
7:04
#8629
20K
12.43 mi11:55:241:28:267:0722:06
7:07
#8279
Half
13.11 mi12:00:131:33:157:074:49
7:04
#8248
25K
15.53 mi12:17:201:50:227:0617:07
7:04
#7951
30K
18.64 mi12:39:422:12:447:0722:22
7:12
#7473
20M
20.00 mi12:49:462:22:487:0810:04
7:24
#7333
21M
21.00 mi12:57:382:30:407:107:52
7:52
#7226
35K
21.75 mi13:03:032:36:057:115:25
7:14
#7170
23M
23.00 mi13:12:532:45:557:139:50
7:51
#7189
24M
24.00 mi13:20:382:53:407:147:45
7:45
#7242
40K
24.85 mi13:27:503:00:527:177:12
8:25
#7408
25.2M
25.20 mi13:31:033:04:057:183:13
9:20
#7507
Finish
26.22 mi13:39:073:12:097:208:04
7:55
#7649
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi9525790279028027(Top 28%)6957(Top 43%)6957(Top 292%)
10K6.21 mi3.10 mi8981+5447583+3197583+3198504(Top 30%)7297(Top 45%)7297(Top 306%)
15K9.32 mi3.11 mi8629+3527359+2247359+2248027(Top 28%)6957(Top 43%)6957(Top 292%)
20K12.43 mi3.11 mi8279+3507127+2327127+2327598(Top 27%)6612(Top 41%)6612(Top 277%)
Half13.11 mi0.68 mi8248+317102+257102+257969(Top 28%)6870(Top 43%)6870(Top 288%)
25K15.53 mi2.42 mi7951+2976901+2016901+2016708(Top 24%)5909(Top 37%)5909(Top 248%)
30K18.64 mi3.11 mi7473+4786546+3556546+3555903(Top 21%)5241(Top 33%)5241(Top 220%)
20M20.00 mi1.36 mi7333+1406416+1306416+1306436(Top 23%)5489(Top 34%)5489(Top 230%)
21M21.00 mi1.00 mi7226+1076307+1096307+1096578(Top 23%)5427(Top 34%)5427(Top 227%)
35K21.75 mi0.75 mi7170+566250+576250+576853(Top 24%)5612(Top 35%)5612(Top 235%)
23M23.00 mi1.25 mi7189-196220+306220+308938(Top 31%)6685(Top 42%)6685(Top 280%)
24M24.00 mi1.00 mi7242-536224-46224-49425(Top 33%)6859(Top 43%)6859(Top 287%)
40K24.85 mi0.85 mi7408-1666301-776301-7712877(Top 45%)8456(Top 53%)8456(Top 354%)
25.2M25.20 mi0.35 mi7507-996345-446345-4413503(Top 48%)8673(Top 54%)8673(Top 363%)
Finish26.22 mi1.02 mi7649-1426405-606405-6012250(Top 43%)8153(Top 51%)8153(Top 342%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 28%
×21story building
+97ft-345ft

Overall

8027

Males

6957

M45-49

6957

5K→10K

3.1 - 6.2 mi

Top 30%
×5story building
+79ft-138ft

Overall

8504

Males

7297

M45-49

7297

10K→15K

6.2 - 9.3 mi

Top 28%
×3story building
+67ft-78ft

Overall

8027

Males

6957

M45-49

6957

15K→20K

9.3 - 12.4 mi

Top 27%
×5story building
+106ft-86ft

Overall

7598

Males

6612

M45-49

6612

20K→Half

12.4 - 13.1 mi

Top 28%
×2story building
+19ft-37ft

Overall

7969

Males

6870

M45-49

6870

Half→25K

13.1 - 15.5 mi

Top 24%
×4story building
+66ft-88ft

Overall

6708

Males

5909

M45-49

5909

25K→30K

15.5 - 18.6 mi

Top 21%
×9story building
+181ft-148ft

Overall

5903

Males

5241

M45-49

5241

30K→20M

18.6 - 20.0 mi

Top 23%
×5story building
+64ft-50ft

Overall

6436

Males

5489

M45-49

5489

20M→21M

20.0 - 21.0 mi

Top 23%
×8story building
+106ft-24ft

Overall

6578

Males

5427

M45-49

5427

21M→35K

21.0 - 21.8 mi

Top 24%
×7story building
+17ft-86ft

Overall

6853

Males

5612

M45-49

5612

35K→23M

21.8 - 23.0 mi

Top 31%
×5story building
+23ft-63ft

Overall

8938

Males

6685

M45-49

6685

23M→24M

23.0 - 24.0 mi

Top 33%
×6story building
+12ft-82ft

Overall

9425

Males

6859

M45-49

6859

24M→40K

24.0 - 24.9 mi

Top 45%
×1story
+6ft-20ft

Overall

12877

Males

8456

M45-49

8456

40K→25.2M

24.9 - 25.2 mi

Top 48%
×1story
+13ft-16ft

Overall

13503

Males

8673

M45-49

8673

25.2M→Finish

25.2 - 26.2 mi

Top 43%
×2story building
+22ft-21ft

Overall

12250

Males

8153

M45-49

8153

Passing Analysis

Category:
Athletes Passed
2786
Passed By
910
Net Change
+1876
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#9525
5K → 10K59349+544#9525#8981
10K → 15K38129+352#8981#8629
15K → 20K38030+350#8629#8279
20K → Half365+31#8279#8248
Half → 25K31114+297#8248#7951
25K → 30K48911+478#7951#7473
30K → 20M17535+140#7473#7333
20M → 21M13326+107#7333#7226
21M → 35K7519+56#7226#7170
35K → 23M85104-19#7170#7189
23M → 24M64117-53#7189#7242
24M → 40K28194-166#7242#7408
40K → 25.2M9108-99#7408#7507
25.2M → Finish27169-142#7507#7649
TOTALS2786910+1876
📊

Passing Visuals

Category:
Loading...

🔄Passing Circle

Loading...

🌊Position Flow

Loading...

🏃Race Lanes

Loading...

Upload your GPX file

Supports Garmin, Apple Watch, Polar, Suunto, COROS, Strava, and other apps

.gpx files up to 10MB

Export Track Data

Download your race performance as a GPX or TCX file to import into Strava, Garmin Connect, or other fitness apps.

Questions or issues regarding timing data?

If you notice any discrepancies in your timing data or have questions about your results, our support team can help.

Contact Race Support

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing