Boston Marathon logo
BOSTON MARATHON 2023

Bjorn Anderson

Bib: 8284•M

FL

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 26622
Top 18%
Gender (Male)
#0 / 15176
Top 29%
Masters (Masters Men)
#0 / 9891
Top 15%
Division (M40-44)
#0 / 2241
Top 36%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
19:46
Rank: #1666
Start → 5K
19:46 | 6:22/mi
10K· 6.21 mi
40:24
Rank: #2510 (-844)
5K → 10K
20:38 | 6:38/mi
15K· 9.32 mi
1:00:25
Rank: #2451 (+59)
10K → 15K
20:01 | 6:27/mi
20K· 12.43 mi
1:20:48
Rank: #2464 (-13)
15K → 20K
20:23 | 6:34/mi
Half· 13.11 mi
1:25:10
Rank: #2449 (+15)
20K → Half
4:22 | 6:24/mi
25K· 15.53 mi
1:41:18
Rank: #2524 (-75)
Half → 25K
16:08 | 6:39/mi
30K· 18.64 mi
2:02:52
Rank: #2701 (-177)
25K → 30K
21:34 | 6:56/mi
20M
2:12:35
Rank: #2809 (-108)
30K → 20M
9:43 | 7:09/mi
21M
2:20:19
Rank: #2969 (-160)
20M → 21M
7:44 | 7:44/mi
35K· 21.75 mi
2:25:40
Rank: #3079 (-110)
21M → 35K
5:21 | 7:09/mi
23M
2:35:16
Rank: #3348 (-269)
35K → 23M
9:36 | 7:40/mi
24M
2:43:45
Rank: #3944 (-596)
23M → 24M
8:29 | 8:29/mi
40K· 24.85 mi
2:51:01
Rank: #4356 (-412)
24M → 40K
7:16 | 8:30/mi
25.2M
2:54:14
Rank: #4495 (-139)
40K → 25.2M
3:13 | 9:20/mi
Finish· 26.22 mi
3:02:41
Rank: #4760 (-265)
25.2M → Finish
8:27 | 8:18/mi

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
Time1:25:10
Pace6:30 /mi
2nd Half
Distance13.11 mi
Time1:37:31
Pace7:26 /mi
📊Positive Split: 14.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:44:5119:466:2219:46
6:22
-
10K
6.21 mi11:05:2940:246:3020:38
6:38
+0:16
15K
9.32 mi11:25:301:00:256:2920:01
6:27
-0:11
20K
12.43 mi11:45:531:20:486:3020:23
6:34
+0:07
Half
13.11 mi11:50:151:25:106:304:22
6:24
-0:10
25K
15.53 mi12:06:231:41:186:3116:08
6:39
+0:15
30K
18.64 mi12:27:572:02:526:3521:34
6:56
+0:17
20M
20.00 mi12:37:402:12:356:389:43
7:09
+0:13
21M
21.00 mi12:45:242:20:196:417:44
7:44
+0:35
35K
21.75 mi12:50:452:25:406:425:21
7:09
-0:35
23M
23.00 mi13:00:212:35:166:459:36
7:40
+0:31
24M
24.00 mi13:08:502:43:456:498:29
8:29
+0:49
40K
24.85 mi13:16:062:51:016:537:16
8:30
+0:01
25.2M
25.20 mi13:19:192:54:146:553:13
9:20
+0:50
Finish
26.22 mi13:27:463:02:416:588:27
8:18
-1:02

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

6:22 /mi

Average Pace

6:58 /mi

Slowest Pace

9:20 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:41:18

55% of race

Time at Steady Pace

36:38

20% of race

Time at Slower Pace

44:45

24% of race

Average Pace: 6:58 /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 mi10:44:5119:466:2219:46
6:22
#1666
10K
6.21 mi11:05:2940:246:3020:38
6:38
#2510
15K
9.32 mi11:25:301:00:256:2920:01
6:27
#2451
20K
12.43 mi11:45:531:20:486:3020:23
6:34
#2464
Half
13.11 mi11:50:151:25:106:304:22
6:24
#2449
25K
15.53 mi12:06:231:41:186:3116:08
6:39
#2524
30K
18.64 mi12:27:572:02:526:3521:34
6:56
#2701
20M
20.00 mi12:37:402:12:356:389:43
7:09
#2809
21M
21.00 mi12:45:242:20:196:417:44
7:44
#2969
35K
21.75 mi12:50:452:25:406:425:21
7:09
#3079
23M
23.00 mi13:00:212:35:166:459:36
7:40
#3348
24M
24.00 mi13:08:502:43:456:498:29
8:29
#3944
40K
24.85 mi13:16:062:51:016:537:16
8:30
#4356
25.2M
25.20 mi13:19:192:54:146:553:13
9:20
#4495
Finish
26.22 mi13:27:463:02:416:588:27
8:18
#4760
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi1666158715872334(Top 9%)2241(Top 15%)2241(Top 100%)
10K6.21 mi3.10 mi2510-8442393-8062393-8063818(Top 14%)3602(Top 24%)3602(Top 161%)
15K9.32 mi3.11 mi2451+592343+502343+502334(Top 9%)2241(Top 15%)2241(Top 100%)
20K12.43 mi3.11 mi2464-132359-162359-162624(Top 10%)2510(Top 17%)2510(Top 112%)
Half13.11 mi0.68 mi2449+152347+122347+122276(Top 9%)2186(Top 14%)2186(Top 98%)
25K15.53 mi2.42 mi2524-752417-702417-703043(Top 11%)2901(Top 19%)2901(Top 129%)
30K18.64 mi3.11 mi2701-1772581-1642581-1643957(Top 15%)3700(Top 24%)3700(Top 165%)
20M20.00 mi1.36 mi2809-1082685-1042685-1044857(Top 18%)4422(Top 29%)4422(Top 197%)
21M21.00 mi1.00 mi2969-1602830-1452830-1455774(Top 22%)5026(Top 33%)5026(Top 224%)
35K21.75 mi0.75 mi3079-1102924-942924-946166(Top 23%)5338(Top 35%)5338(Top 238%)
23M23.00 mi1.25 mi3348-2693171-2473171-2477505(Top 28%)6114(Top 40%)6114(Top 273%)
24M24.00 mi1.00 mi3944-5963696-5253696-52514342(Top 54%)9446(Top 62%)9446(Top 422%)
40K24.85 mi0.85 mi4356-4124068-3724068-37213271(Top 50%)8889(Top 59%)8889(Top 397%)
25.2M25.20 mi0.35 mi4495-1394188-1204188-12014210(Top 53%)9303(Top 61%)9303(Top 415%)
Finish26.22 mi1.02 mi4760-2654397-2094397-20914017(Top 53%)9236(Top 61%)9236(Top 412%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 9%
×21stories
+97ft-345ft

Overall

2334

Males

2241

M40-44

2241

5K→10K

3.1 - 6.2 mi

Top 14%
×5stories
+79ft-138ft

Overall

3818

Males

3602

M40-44

3602

10K→15K

6.2 - 9.3 mi

Top 9%
×3stories
+67ft-78ft

Overall

2334

Males

2241

M40-44

2241

15K→20K

9.3 - 12.4 mi

Top 10%
×5stories
+106ft-86ft

Overall

2624

Males

2510

M40-44

2510

20K→Half

12.4 - 13.1 mi

Top 9%
×2stories
+19ft-37ft

Overall

2276

Males

2186

M40-44

2186

Half→25K

13.1 - 15.5 mi

Top 11%
×4stories
+66ft-88ft

Overall

3043

Males

2901

M40-44

2901

25K→30K

15.5 - 18.6 mi

Top 15%
×9stories
+181ft-148ft

Overall

3957

Males

3700

M40-44

3700

30K→20M

18.6 - 20.0 mi

Top 18%
×5stories
+64ft-50ft

Overall

4857

Males

4422

M40-44

4422

20M→21M

20.0 - 21.0 mi

Top 22%
×8stories
+106ft-24ft

Overall

5774

Males

5026

M40-44

5026

21M→35K

21.0 - 21.8 mi

Top 23%
×7stories
+17ft-86ft

Overall

6166

Males

5338

M40-44

5338

35K→23M

21.8 - 23.0 mi

Top 28%
×5stories
+23ft-63ft

Overall

7505

Males

6114

M40-44

6114

23M→24M

23.0 - 24.0 mi

Top 54%
×6stories
+12ft-82ft

Overall

14342

Males

9446

M40-44

9446

24M→40K

24.0 - 24.9 mi

Top 50%
×1story
+6ft-20ft

Overall

13271

Males

8889

M40-44

8889

40K→25.2M

24.9 - 25.2 mi

Top 53%
×1story
+13ft-16ft

Overall

14210

Males

9303

M40-44

9303

25.2M→Finish

25.2 - 26.2 mi

Top 53%
×2stories
+22ft-21ft

Overall

14017

Males

9236

M40-44

9236

Passing Analysis

Category:
Athletes Passed
320
Passed By
3414
Net Change
-3094
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#1666
5K → 10K1845-844#1666#2510
10K → 15K10849+59#2510#2451
15K → 20K5972-13#2451#2464
20K → Half205+15#2464#2449
Half → 25K30105-75#2449#2524
25K → 30K30207-177#2524#2701
30K → 20M16124-108#2701#2809
20M → 21M6166-160#2809#2969
21M → 35K14124-110#2969#3079
35K → 23M19288-269#3079#3348
23M → 24M1597-596#3348#3944
24M → 40K6418-412#3944#4356
40K → 25.2M3142-139#4356#4495
25.2M → Finish7272-265#4495#4760
TOTALS3203414-3094
📊

Passing Visuals

Category:
Loading...

🔥Passing Intensity

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
Share Feedback

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing